It’s a high chance that he is a Muslim terrorist. We still don’t have all the info, at this point neither will the police. Until they look at everything, there is no chance we will have any concrete information at all about this. I think that in the long term, after the police go through everything, there will indeed be substantial connections to terrorists groups that are not Christian or even nationalistic, but Islamic. Already a few jihad organizations are taking full credit and anyone can post anything on their Facebook page. I could claim to be a black male Jew while being a white female Christian.
True enough, of course. But bear in mind that jihadist groups claim credit for everything and anything.
If there was some catastrophic natural disaster like an earthquake or volcanic eruption in “The Land of the Infidels”, some jihadi group would say, “We did that!”