Wrong. Some drivers don't expect it, but others will consider the possibility of that happening and not put themselves in a situation...
Nope. Choice of music, cam, and mount not withstanding, OP did nothing wrong here.
The intersection is crappy because there's very little room for incoming traffic to filter into the right turn lane from the far left lanes, which I suspect often results in vehicles not being able to get there when they want to.
That's just New Jersey for ya.
That Lexus was stuck in a left turn lane, and once he entered the intersection, was legally obligated to turn left. And he should have sucked it up and done just that, then found a way to legally turn himself around down the road, as others have said.
Were I the OP, I'd have done the same thing. I'm in the "proceed straight" lane, the light turns green, that lane is MINE. I'd keep a cautious peripheral eye on the guy in the left lane next to me, but not someone two lanes over.
Your analysis of the situation assumes that the OP was somehow partially at fault for not being omniscient. He was likely looking ahead to clear his own path, while you--likely incorrectly--assume that he was seeing and processing everything his camera was with its much wider FOV.
Lastly, from a legal perspective, he was fully entitled to assume that every other driver there was going to follow applicable traffic laws just as he was.
You continue to insist that he either did something wrong, or he should have known some other driver was going to so egregiously violate traffic laws and so had a duty to avoid it.
Might be true where you live, but not here.
Your argument is the equivalent of blaming a guy who got hit in a roundabout by someone failing to yield while entering because he failed to anticipate that guy might break traffic rules while he was looking ahead to clear his own path.