A former FDNY commissioner’s son who once tweeted “I like Jews about as much as hitler” will join a firehouse in the middle of Orthodox Jewish Brooklyn, The Post has learned.

The stunning move infuriated a local lawmaker.

“For him to be assigned to Borough Park, where you have an incredible number of Holocaust survivors, is an insult to our community,” fumed Assemblyman Dov Hikind. “Put him somewhere else.”

Joseph M. Cassano, 28, the son of ex-commissioner Salvatore Cassano, graduated from the Fire Academy on Wednesday and was sent to Engine 247 on 60th Street.

Joseph Cassano quit his job as an FDNY emergency medical technician in March 2013 after The Post exposed his barrage of tweets, which also derided the poor and the black people he had to serve.

“All of us make mistakes, but we’re talking about a guy who made the kind of vile remark that is so hateful and beyond the pale,” said Hikind, whose parents were Auschwitz survivors. “I want to be fair, but when you make that kind of statement, you lose me. I’m done with you.”

Hikind said the FDNY should “find a community that doesn’t have a problem with what he said. He can do his job there.”

When he resigned, Joseph Cassano issued an apology. The FDNY re-hired him as an EMT in July 2015. He took the “promotion to firefighter” exam in December 2016 and joined the Bravest last year.

FDNY spokesman Jim Long said, “Probie assignments are at the discretion of the Department, and every member is expected to perform their duties with dedication, commitment and compassion to the people they serve – for which they will be held accountable.”