Bro I'm sure this is garbage. The NYPost article on this subject says Bongino is saying even the guy who asked the question is a suspect, which we already know is garbage.
It's fine and normal to speculate and entertain all possibilities, especially when there are still so many unknowns, but when all is said is done and and we find that trans people had nothing to do with this, aside from the trans partner whose entire world probably collapsed on that fateful day, will you look back and say "Why did we try so hard to somehow pin this on trans people?", from the bullets being engraved with trans ideology, the shooter being trans, the trans roommate or some wider reaching trans ideology being responsible for his indoctrination, etc? No, you won't, and that's what a lot a lot of people have problems with, if you want to go full circle.