quality:corruption
Influence in his time

In the 21st century, Ibn Taymiyya is one of the most cited medieval authors and his treatises are regarded to be of central intellectual importance by several Islamic revivalist movements. Ibn Taymiyya's disciples, consisting of both Hanbalis and non-Hanbalis, were attracted to his advocacy of ijtihad outside the established boundaries of the madhabs and shared his taste for activism and religious reform. Some of his unorthodox legal views in the field of Fiqh were also regarded as a challenge by mainstream Fuqaha. Many scholars have argued that Ibn Taymiyya did not enjoy popularity among the intelligentsia of his day. Yossef Rapoport and Shahab Ahmed assert that he was a minority figure in his own times and the centuries that followed. Caterina Bori goes further, arguing that despite popularity Ibn Taymiyya may have enjoyed among the masses, he appears to have been not merely unpopular among the scholars of his day, but somewhat of an embarrassment. Khalid El-Rouayheb notes similarly that Ibn Taymiyya had "very little influence on mainstream Sunni Islam until the nineteenth century" and that he was "a little-read scholar with problematic and controversial views." He also comments "the idea that Ibn Taymiyya had an immediate and significant impact on the course of Sunni Islamic religious history simply does not cohere with the evidence that we have from the five centuries that elapsed between his death and the rise of Sunni revivalism in the modern period." It was only since the late nineteenth and the early twentieth centuries that the scholarly influence of Ibn Taymiyya has come to acquire an unprecedented prominence in Muslim societies, due to the efforts of Islamic revivalists like Rashid Rida. On the other hand, Prof. Al-Matroudi of SOAS university says that Ibn Taymiyya, "was perhaps the most eminent and influential Hanbali jurist of the Middle Ages and one of the most prolific among them. He was also a renowned scholar of Islam whose influence was felt not only during his lifetime but extended through the centuries until the present day." Ibn Taymiyya's followers often deemed him as Sheikh ul-Islam, an honorific title with which he is sometimes still termed today.

In the pre-modern era, Ibn Taymiyya was considered a controversial figure within Sunni Islam and had a number of critics during his life and in the centuries thereafter. The Shafi'i scholar Ibn Hajar al-Haytami stated that,

Make sure you do not listen to what is in the books of Ibn Taymiyya and his student Ibn Qayyim al-Jawziyya and other such people who have taken their own whim as their God, and who have been led astray by God, and whose hearts and ears have been sealed, and whose eyes have been covered by Him... May God forsake the one who follows them, and purify the earth of their likes.

He also stated that,

Ibn Taymiyya is a servant whom God has forsaken, led astray, made blind and deaf, and degraded. Such is the explicit verdict of the leading scholars who have exposed the rottenness of his ways and the errors of his statements.

Taqi al-Din al-Hisni condemned Ibn Taymiyya in even stronger terms by referring to him as the "heretic from Harran" and similarly, Munawi considered Ibn Taymiyya to be an innovator though not an unbeliever. Taqi al-Din al-Subki criticised Ibn Taymiyya for "contradicting the consensus of the Muslims by his anthropomorphism, by his claims that accidents exist in God, by suggesting that God was speaking in time, and by his belief in the eternity of the world." Ibn Battūta (d. 770/1369) famously wrote a work questioning Ibn Taymiyya's mental state. The possibility of psychological abnormalities not with-standing, Ibn Taymiyya's personality, by multiple accounts, was fiery and oftentimes unpredictable. The historian Al-Maqrizi said, regarding the rift between the Sunni Ash'ari's and Ibn Taymiyya, "People are divided into two factions over the question of Ibn Taymiyya; for until the present, the latter has retained admirers and disciples in Syria and Egypt." Both his supporters and rivals grew to respect Ibn Taymiyya because he was uncompromising in his views. Dhahabi 's views towards Ibn Taymiyya were ambivalent. His praise of Ibn Taymiyya is invariably qualified with criticism and misgivings and he considered him to be both a "brilliant Shaykh" and also "cocky" and "impetuous". The Hanafi - Maturidi scholar 'Ala' al-Din al-Bukhari said that anyone that gives Ibn Taymiyya the title Shaykh al-Islām is a disbeliever.

Despite the prevalent condemnations of Ibn Taymiyya outside Hanbali school during the pre-modern period, many prominent non-Hanbali scholars such as Ibrahim al-Kurrani (d.1690), Shāh Walī Allāh al-Dihlawi (d. 1762), Mehmet Birgiwi (d. 1573), Ibn al-Amīr Al-San'ani (d. 1768), Muḥammad al-Shawkānī (d. 1834), etc. would come to the defense of Ibn Taymiyya and advocate his ideas during this era. In the 18th century, influential South Asian Islamic scholar and revivalist Shah Waliullah Dehlawi would become the most prominent advocate of the doctrines of Ibn Taymiyya, and profoundly transformed the religious thought in South Asia. His seminary, Madrasah-i-Rahimya, became a hub of intellectual life in the country, and the ideas developed there quickly spread to wider academic circles. Making a powerful defense of Ibn Taymiyya and his doctrines, Shah Waliullah wrote:

Our assessment of Ibn Taimiyya after full investigation is that he was a scholar of the 'Book of God' and had full command over its etymological and juristic implications. He remembered by heart the traditions of the prophet and accounts of elders (salaf)... He excelled in intelligence and brilliance. He argued in defence of Ahl al-Sunnah with great eloquence and force. No innovation or irreligious act is reported about him... there is not a single matter on which he is without his defence based on the Qur'an and the Sunnah. So it is difficult to find a man in the whole world who possesses the qualities of Ibn Taimiyya. No one can come anywhere near him in the force of his speech and writing. People who harassed him did not possess even one-tenth of his scholarly excellence...

The reputation and stature of Ibn Taymiyya amongst non-Ḥanbalī Sunni scholars would significantly improve between the eighteenth and twentieth centuries. From a little-read scholar considered controversial by many, he would become one of the most popular scholarly figures in the Sunni religious tradition. The nineteenth-century Iraqi scholar Khayr al-Dīn al-Ālūsī (d. 1899) wrote an influential treatise titled Jalā’ al-‘aynayn fi muḥākamat al-Aḥmadayn in defense of Ibn Taymiyya. The treatise would make great impact on major scholars of the Salafiyya movement in Syria and Egypt, such as Jamāl al-Dīn al-Qāsimī (d. 1914) and Muḥammad Rashīd Riḍā (d. 1935). Praising Ibn Taymiyya as a central and heroic Islamic figure of the classical era, Rashid Rida wrote:

...after the power of the Ash‘aris reigned supreme in the Middle Ages (al-qurūn al-wusṭā) and the ahl al-ḥadīth and the followers of the salaf were weakened, there appeared in the eighth century the great mujaddid, Shaykh al-Islam Aḥmad Taqī al-Dīn Ibn Taymiyya, whose like has not been seen in mastery of both the traditional and rational sciences and in the power of argument. Egypt and India have revived his books and the books of his student Ibn Qayyim al-Jawziyya, after a time when they were only available in Najd. Now, they have spread to both east and west, and will become the main support of the Muslims of the earth.

Ibn Taymiyya's works served as an inspiration for later Muslim scholars and historical figures, who have been regarded as his admirers or disciples. In the contemporary world, he may be considered at the root of Wahhabism, the Senussi order and other later reformist movements. Ibn Taymiyya has been noted to have influenced Rashid Rida, Abul A`la Maududi, Sayyid Qutb, Hassan al-Banna, Abdullah Azzam, and Osama bin Laden. The terrorist organization Islamic State in Iraq and the Levant used a fatwa of Ibn Taymiyya to justify the burning alive of Jordanian pilot Muath al-Kasasbeh. After the Iranian revolution, conservative Sunni ulema robustly championed Ibn Taymiyya's anti-Shia polemics across the Islamic World since the 1980s; and vast majority of Sunni intellectual circles adopted Ibn Taymiyya's rhetoric against Shi'ism.