It's all quite understandable. He doesn't like the protest or the protesters, he's a young meathead with an assault rifle, so he takes his gun and drives across a state line with the explicit intention of getting involved in a street protest. Why?Why was he there? He was there to instigate, that's why---instigate in a volatile situation. He gets into it with some of the protesters--which was bound to happen and absolutely his aim and his dream from the beginning---a couple of them angrily engage with him or come at him--and he uses his gun to kill them.
The self-defense argument was complete bull$hit--he was another idiot with an assault rifle who was expressly there to instigate. He didn't like the protestors--and he was the only person there with a gun. There have been numerous similar cases of these idiots who carry guns around and either try to provoke people whom they don't like or are happy to get involved in such situations because, if a fight breaks out, they've got their gun, can shoot somebody and, like the real pu$$ies they are, claim self-defense. The people this young high-school dropout/criminal killed did not have guns; he did--that's what he was there. He instigated, and he should be in prison. Clowns with guns, trying to impress everybody with how tough they are. They provoke others and get pushed, ad then they shoot somebody. Use your fists, tough guy. The guy is another gun-toting moron and pu$$y.