Facts are important, but it’s not possible to come with only the ones you prefer. You need to make room for more.

• He obtained firearms illegally, from people who encouraged him to take violent action throughout his upbringing.
• He didn’t believe he was acting valorous, he thought he was going to get to shoot people.
• It turned out very different than he expected and he did what he was conditioned to do, it was murder and it was in self defense. It was very sad.
• He’s since gone on to gloat about it and threaten to do stuff like that again.

That people are looking at all this and thinking it seems like premeditated murder that turned into a panicked self defense (except with a literal killing weapon on hand, which he brought!) is perfectly reasonable.

To be honest, debating it feels gross. It seems more sensible to just recognize that it makes sense people would feel this way, and move on. Regardless of what the courts say, this conclusion makes total sense.