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Terrorism

Some extremists have used their interpretation of Islamic scriptures and Sharia, in particular the doctrine of jihad, to justify acts of war and terror against Muslim as well as non-Muslim individuals and governments. The expert on terrorism Rachel Ehrenfeld wrote that the "Sharia's finance (Islamic banking) is a new weapon in the arsenal of what might be termed fifth-generation warfare (5GW) ". However, sharia-complaint financing actually requires a person to stay away from weapons manufacturing.

In classical fiqh, the term jihad refers to armed struggle against oppressors. Classical jurists developed an elaborate set of rules pertaining to jihad, including prohibitions on harming those who are not engaged in combat. According to Bernard Lewis, "t no time did the classical jurists offer any approval or legitimacy to what we nowadays call terrorism" and the terrorist practice of suicide bombing "has no justification in terms of Islamic theology, law or tradition". In the modern era the notion of jihad has lost its jurisprudential relevance and instead gave rise to an ideological and political discourse. While modernist Islamic scholars have emphasized defensive and non-military aspects of jihad, some radicals have advanced aggressive interpretations that go beyond the classical theory. For al-Qaeda ideologues, in jihad all means are legitimate, including targeting Muslim non-combatants and the mass killing of non-Muslim civilians.

Some modern ulema, such as Yusuf al-Qaradawi and Sulaiman Al-Alwan, have supported attacks against Israeli army reservists and hence should be considered as soldiers, while Hamid bin Abdallah al-Ali declared that suicide attacks in Chechnya were justified as a "sacrifice". Many prominent Islamic scholars, including al-Qaradawi himself, have issued condemnations of terrorism in general terms. For example, Abdul-Aziz ibn Abdullah Al ash-Sheikh, the Grand Mufti of Saudi Arabia has stated that "terrorizing innocent people constitute a form of injustice that cannot be tolerated by Islam", while Muhammad Sayyid Tantawy, Grand Imam of al-Azhar and former Grand Mufti of Egypt has stated that "attacking innocent people is not courageous; it is stupid and will be punished on the Day of Judgment".