Scratch a liberal, and you get a petulant, adolescent racist.

The “30 Rock’’ star grabbed the reporter, Tara Palmeri, by her arm and told her, “I want you to choke to death,” Palmeri told police, for whom she played an audiotape of the conversation.

He then called G.N. Miller — a decorated retired detective with the NYPD’s Organized Crime Control Bureau and a staff photographer for The Post — a “coon, a drug dealer,’’ Miller’s police statement said.

At one point, Miller showed Baldwin ID to prove he’s a retired NYPD cop, which Baldwin dismissed as “fake.”

Cops were called, and Miller, 56, and Baldwin, 54, both filed harassment claims against each other.

Minutes later, Baldwin ranted on Twitter.

“Thank u 2 NYPD officers who came to my home 2day so that I could file a formal complaint against NY Post “photographer’’ who assaulted me,’’ he tweeted.

In another post, Baldwin referred to Miller, for unknown reasons, as “Ralston,” writing, “Moments after I tweet about the Post, Ralston, the ex-crackhead ‘photographer’ shows up at my door w 1 of Murdoch’s nieces in tow.”

He added, “Ralston claims he’s ex NYPD!! That can’t be!!! Ex NYPD don’t become crackhead, ex jailhouse paparazzi!”

The actor eventually removed most of the posts.

via Alec Baldwin’s goes on alleged racist rant against Post photographer – NYPOST.com.