Once again, Billy Eisengrein feels he’s under attack.

“It offends me as an American,’’ he told me. “To downplay and diminish [the picture]. It is bulls–t!

“It’s political correctness and trying to rewrite history. People are not afraid about offending Americans, and people who have a strong belief on what this country was founded on,’’ said Billy, 49, still a firefighter at Rescue 2 in Brooklyn.

“If it was up to me — and you can print this — if he thinks that picture is too rah-rah America, he should move someplace better in this world to live. I’ve had it with political correctness. It’s taking the country down.’’