..a recent study by Islamic theologian and professor of Islamic religious education at the University of Vienna, Ednan Aslan, which was commissioned by the Austrian ministry of Foreign Affairs. The purpose of the 310-page study, which was conducted over 18 months and involved interviews with 29 Muslims who were all jailed or in juvenile detention (over half for having committed terrorist offenses) was reportedly to investigate the role that Islam plays in the radicalization of young Muslims in Austria. The study showed that jihadists are not, as Western leaders claim, ignorant of Islam and therefore "perverting" it. On the contrary, the jihadists apparently have a deep understanding of Islamic theology. Aslan explicitly warns against reducing the issue of Islamic terrorism to questions of "frustrated individuals, who have no perspective, are illiterate and have misunderstood Islam".

The study found that three factors were particularly relevant to the radicalization process of the interviewees. The first factor was Islam itself: The interviewees had actively participated in their own radicalization, by engaging with the content, norms and standards of Islamic doctrine, and had apparently found this engagement to be a positive turning point in their lives. The study describes the approach to Islam of these men as "Salafism", which it defines as the view that Islam comprises all aspects of life, religious, personal and societal. Moreover, the majority of the men evidently came from religious Muslim homes and were therefore already familiar with the foundations of Islam. The study explicitly states that the prevailing assumption that the majority of radicalized Muslims know very little about Islam could not be confirmed by the interviewers' findings.

The second factor was the environment: the specific mosques and imams to which the men went and on which they relied. Although the internet evidently did play a role in the radicalization process, the study showed that face-to-face encounters were more important, and that dawa, proselytizing Islam, played a central role in this process, as the men themselves became missionaries for Islam. Notably, the study showed that the level of theological knowledge determined the individual's role in the hierarchy -- the more knowledge they had of Islam, the more authority they had.

The third factor was the establishment of a "them and us" distinction between the radicalized men and the rest of the world, especially the belief that the West is an enemy of the Muslim world. The distinction also involved a rejection of democracy and a commitment to the establishment of a caliphate governed by sharia law, which the men want to bring about either through dawa (proselytizing) or violence (jihad).

Critics might argue that a qualitative study of 29 radical Muslims is not representative of most Islamic terrorists, but that is hardly true. In 2015, Sheikh Muhammad Abdullah Nasr, a scholar of Islamic law and graduate of Egypt's Al Azhar University, explained why the prestigious institution, which educates mainstream Islamic scholars, refused to denounce ISIS as un-Islamic:

"The Islamic State is a byproduct of Al Azhar's programs. So can Al Azhar denounce itself as un-Islamic? Al Azhar says there must be a caliphate and that it is an obligation for the Muslim world. Al Azhar teaches the law of apostasy and killing the apostate. Al Azhar is hostile towards religious minorities, and teaches things like not building churches, etc. Al Azhar upholds the institution of jizya [extracting tribute from non-Muslims]. Al Azhar teaches stoning people. So can Al Azhar denounce itself as un-Islamic?"
https://www.gatestoneinstitute.org/11091/islamic-terrorism

studia: http://iits.univie.ac.at/fileadmin/user_upload/p_iits/Pictures_colleagues/radikalisierung_2017_07_19_onlineversion_einzelseiten.pdf