The press narrative on the person of Ali David Sonboly needs to be seriously questioned. After reading Walid Shoebat's interpretation of events, We cannot assume anything the press says as being truthful or informative.
http://shoebat.com/2016/07/23/the-munich-massacre-is-a-complete-coverup-the-munich-shooters-facebook-including-his-family-background-shows-he-is-not-iranian-but-a-syrian-islamist-pro-turkey/

What "leaders?"

Of course, you realize you're on your own, now. This is certainly a lot like the Dark Ages.

The left cannot get that some people have deeply held religious beliefs. They especially don't get that Islamists believe killing infidels provides a "get into Heaven free card." Yeah, it's a crazy belief, but we have a plethora of evidence that it is held by quite a large number of Muslim males. Just because you wouldn't hold that belief doesn't mean it doesn't exist.

The left is akin to the three monkeys who see no evil, hear no evil, or speak no evil - blind, deaf, and mute.

The press never tells the truth about Islam or Islamic terrorism, about abortion, about so-called climate change, and so on. They are not paid and instructed by the State, as were for example the people who wrote for Pravda. They are worse. They are dogmatic true believers pushing the narrative of their cult. Eric Hoffer said all there was to say about this type of zombie in 1951 in The True Believer.