Charlie was not targeted over a characteristic like sexuality, race, and whatnot that would make it a hate crime.
Charlie could have very well chosen not to push a narrative that strips 2A from a minority.
He has been fanning the flames for years. He has exploited political conflict for personal gain.
What you clearly missed is that Charlie could have had a life that was different had his behaviour been different.
He was not attacked over an immutable or protected characteristic. He was not murdered because he is white/straight/gay/black/trans. His murder was independent of his characteristics and entirely dependent on his character.
There is no “hate crime” here as far as the definition is concerned.