Since the would-be assassin of seems to have been one of them.
Well, shit.
What is a groyper?
Alt-right twitter debate trolls who’d use a version of pepe with steepled fingers.
https://en.m.wikipedia.org/wiki/Groypers
Edit: Also could just be a Nick Feuntes follower. Now that would be awfully coveinent if he was a flat out neo-nazi. But I suspect he was just unstable.