Exactly. It’s very complex and not black and white at all.
If I had to speculate, as the rifleman is dead so we will never know, I’d wager he wasn’t planning on shooting Perry, but didn’t have good intentions either. I mean, in the interview he did earlier, he literally said he didn’t think anyone would do anything. He didn’t expect to get shot. He did expect to use his rifle as intimidation and to empower others to do bad things. So while he may not have been personally a deadly threat, I think the group as a whole, was. And being he was the one clearly with the most immediate potential, he was the one Perry targeted.
Sucks for him but that’s the potential when you go armed with a group of people out committing havoc and other crimes.