Dude just google shit yourself. I dunno where Scrofula loves but just googled for religious demographics.
http://www.thedailybeast.com/no-islam-isnt-inherently-violent-and-the-math-proves-it
Thats a decent read and theres heaps of stats around proving caucasian men are largely behind violent crimes and murders etc .
However I did have trouble getting a lot of American based journals to differentiate in stats between RACE and RELIGIOUS BACKGROUND. . Two completely different things. One thing that stands out is the Muslim population dont even rate a mention at all in any stats. Its either black, white or latino.
These terror groups are just recruiting anyone thats violent or criminal first and their religion comes second now. Anyone can bloody join.
I really hope that the ignorance and blind hate that some people here post about Muslims as a whole calms down. Its really stupid.