Rittenhouse was not in any way in danger of either at the time he shot Rosenbaum. Rosenbaum wasn't armed and hadn't even hurt him. Plus, every indication we have is that Rosenbaum is the one who was acting in defense, there, in trying to stop someone who was threatening lethal force against peaceful protesters.
None of that is turning yourself in to the police. I have no idea where the hell you're even getting that.He attempted to, he approached police with his arms raised.
He only walked past him when they ordered him away. You can hear it on the video are you deaf? He 'fled the state' because he went home, right on the other side of the state lines, he wasn't ordered to stay.