Do you suppose it is Islam itself that makes a person insane at some point? Not a certain "brand" of Islam, as in radical Islam. All Muslims do not go insane. So what is the cause of their mental illness?
Could it be the insanity of the Muslim leaders they listen to? The ones that tell them to cling to their bombs and religion and prophet.
Islam is a degraded creed that nurtures hate, deviance and violence. It leads away from salvation. It matters little that not every muslim is actively violent they ALL allow it in their midst.