I was just trying to explain dangers of Islam.

No you werent. You were making braod assumptions that are already proven to be wrong and you blame it on "Islam", which implies "all Muslims", despite there being evidence of psychiatric disorder in the suspect. Schizophrenia and other disorders with mania often express themselves in religious symbols. but if a psychatric ill person refers to Christianity would you say that this is Christianity for everyone? Probably not.

Also you should consider carefully, if you want to stir more anti-Muslim sentiment. When it comes to progroms, the people will not care if you are muslim, atheist, christian or jew. They'll just see a "brown" person. You might get praise from the political right now, but they will not protect you, no matter how loudly you announce to be different from the other "brown people".