He was actually charged with reckless endangerment as well, and found not guilty on those counts too. Presumably because he only shot people who were an immediate threat to him, from short range. Again, describing what he did as "firing into a crowd" is just a poor description meant to evoke imagery very unlike what happened - the evidence points to two of the three people he shot either reaching for his gun. He shot specific targets who he claims he believed were an immediate threat to him (and a jury unanimously agreed this belief was reasonable in the context of available evidence).
I'd argue all of his poor judgement was prior to the shootings or in the days and months afterward (for example, being there at all was a generally bad idea, but not illegal). But as I have to keep pointing out, if you can legally be somewhere, you don't have to justify being there as part of self defense. Likewise, whoever you buddy up with or who decides they support you after the fact is irrelevant to if the act itself was self defense. In WI, self defense with force likely to cause death or great injury only requires a reasonable belief that one is at risk death or great injury to oneself. A jury unanimously agreed that in the situation he was in that a reasonable person would believe that they were at risk of death or great injury.
I'd also argue that people doubling down on him living in another state, or that he didn't "need" to be there, etc rather than focusing on the events surrounding the actual shootings are intentionally trying to obscure things. Particularly the ones who seem to actively try to ignore evidence from the trial. Honestly, before the trial, based on what had been going around in the media I was expecting him to be found guilty of shooting Rosenbaum and Grosskreutz, guilty on the illegal weapon possession charge, not guilty by self defense for shooting Huber and not guilty on the reckless endangerment charges. But the evidence presented at trial changed that, and having watched the entire trial I can't argue with the verdicts that were given.