Indeed, I didn't know about this incident, thanks for sharing it.

Anyway, I wasn't trying to say that Sikhs are more or less likely than any other group to be pacifist. I was saying we shouldn't even be having this discussion, and simply scan people for weapons, and use things like actual random screening to help as needed. And that religious reasons for carrying weapons are not a valid excuse.

I'd say that incident falls under political extremism, not religious extremism. Which is all the more reason to check people's individual beliefs rather than their race or ethnicity. Anyone from any background can be radicalized; some formatting is more prone to it than others. Sikhs, as you say, are pretty chill. Not being pacifist doesn't mean you want to go out and kill anyone.