But that detail is pretty damn significant IMO.

We have cases where rappers have had rap lyrics used against them. I don't know if there's a state law issue there that allowed that, and not this, but that's glaring IMO.

If someone saying "I wish I were there with my gun so I can shoot people"- paraphrased- on social media, and then... going there with there gun and shooting people isn't enough of an illustration that this was the intent all along to be admitted as evidence, I'm at a loss for words.

Moreover, I don't see how you can insert yourself into a hostile situation in the manner he did, especially after saying that shit publicly, and actively putting yourself into a situation you would likely have to defend yourself, thereby creating that situation, and then claim self defense.