Absolutely, but not by an enormous margin. Daniel Dennett has made some extremely cogent points about why that is the case, but to me it boils down to the emphasis on submission to the will of god and the strength of that belief which lends it the ability to inspire in its adherents a willingness to sacrifice their own lives for a higher cause. Whenever self preservation is no longer the most important thing to a human being, they become extremely dangerous. Of course other religions have and do have this effect on people, but not with quite the same frequency. I would actually argue that almost all religions would be equally dangerous if their fundamental tenets were followed, I just think that Muslims tend to actually believe in their religion more than other religions where most people kinda half ass it. That could be a product of the fact that many Muslim countries have vastly reduced access to information, and thus are less likely to question their views since their view is constantly reinforced by their peer groups and authority figures, and might (hopefully will) change with time.