Where are you drawing this obsession with Communists? He supported Sanders originally for the 2020 ticket, so he isn't anti-socialist. He donated frequently to ActBlue, the progressive leftist outfit, same as the last failed assassin, and he donated to these political candidates that included Yang (the Universal Basic Income candidate) and Beto O'Rourke who was widely accepted as the most progressive establishment candidate besides Bernie:
He was supportive of Harris and Biden in recent posts following that assassination attempt. He showed no empathy for Trump.
I've seen half a dozen social media posts and videos of him talking about wanting "revolutionaries" to "take the whole system down". That's an anarchist sentiment quite popular with many Communists who oppose our Capitalist order in the West-- made up of those NATO nations.
He was all over the map. The only thing that was consistent was this obsession with supporting Ukraine in their war. Nothing else. It appears he was crazy, but I wanted to entertain the possibility there was something deeper, there.