It's certainly no surprise that Noah Solloway's book wasn't well received in Montauk. But do we really think that's the only reason he isn't well liked in the area?
At least he admits right up front in this clip from The Affair Season 2 Episode 3 that he would have liked to kill Scotty Lockart, but didn't because he's a civilized human being.
While he says he killed a deer, still, his memory of the moment betrays his words. Whether it was Scotty that he ran down, it sure looks like he recalled running down a human being. Or a deer wearing a person suit.
Whatever happened, it appears his attorney's best defense is to find the real culprit. Judging by the looks on Alison's face as Noah pleads his case, that just may be his only defense.