That was a really poor choice of thread-title, by the way. I mean, aside from the inappropriate jocularity, wasn't William Tell Swiss? What reason do the Swiss have for wanting revenge on Norway?
It's looking as if the murder of the MP David Amess probably has an Islamist angle, as now it's being reported the killer is a Brit of Somalian origin. People are cynical about the notion that a white guy killer is "mentally ill", whereas non-whites are "terrorists", but, quite honestly, I think it's a very fuzzy distinction in either case.
Whether it's "angry white men" or "islamists" it seems to me that there's usually an element of individual mental instability involved. The ideology often seems like just a pretext for acting on a desire to do something dramatic and violent, to work out some internal mental problem.
Conservative white men and Muslim men seem to have a lot in common in terms of how they address their mental problems.