The second factor in the radicalization of Muslim youth is the increase of discriminatory policies vis-à-vis Islamic practices in Europe, including the use of the hijab and regulation of mosque minarets, circumcision and halal food. All contribute to a growing sense among Muslims that they are not accepted as full members of European society. Today, anti-Islamic discourse, not simply xenophobic sentiment, translates into discriminatory practices in employment, housing and political activities. It can be a factor in strengthening a defensive identification within Islam and therefore gives more leverage to any ideology that pits the West against Muslims.Source
So it's evil Europeans, with their burka and minaret bans, that shamefully induce Muslims to want to chop people's heads off. This article was actually called "Europe needs to embrace Islam" but it looks like they changed the headline after publishing it. You can still see the original in the URL.