It is funny that you skipped over my criticism of you to agree with my criticism of the US government as if I didn't make a clear connection between those two. If you "know that it doesn't have to be two parties who have to convert all opinions into binary and pick a side", why did your original comment reduce this issue down to a binary? Can you admit that it is possible for someone to disagree with Kirk from the right?
Yes, but the casings were engraved with things like "catch, fascist", so it's pretty clear the shooter fell into leftist propaganda, which is a thing because currently, we are forced to pick from 1 of 2 parties. Perhaps he thought he would be seen like Luigi but instead he's just a weirdo.
It is not at all clear at this moment in time that the shooter had any consistent or coherent political leanings. Do you think growing up in a conservative house he might have been exposed to more "rightist propaganda", as you would put it? He certainly grew up in gun culture, which I would guess had more to do with the sick thing he did to Kirk than having a trans roommate did.