Lots of haters are comparing Donald Trump to Adolf Hitler (when they aren’t comparing him to Mussolini). But no one points out that Trump is the only presidential candidate with Orthodox Jewish grandchildren. And he’s about to get another one.

Ivanka Trump, who is pregnant, converted before she married Jared Kushner — unlike Chelsea Clinton, who married Marc Mezvinsky.

So Ivanka’s kids, Arabella, 4, and Joseph, 2, are Jewish, while Chelsea’s daughter, Charlotte, 1, is believed to be Methodist, like her mother.

Jewsnews.co.il posted above its item about Charlotte’s birth: “The child is not Jewish . . . Chelsea Clinton is not Jewish, therefore neither is this child.” Clinton is now pregnant with baby No. 2.

As for Bernie Sanders, who describes himself as a “secular Jew,” his son Levi Sanders, 46, is not known to be religious. Bernie’s second wife is Catholic; Levi is the product of a relationship between Bernie’s two marriages.

Rabbi Shmuley Boteach told me, “The disgusting, vile comparisons of Donald Trump to Hitler are the ultimate trivialization of the Holocaust.”

In a column for the Jerusalem Post, Boteach said, “While I can understand why political opponents do not want Trump as president . . . that still does not give them the right to dishonor the memory of the millions who lost their lives in the Holocaust, or take a man with whom they may have sharp disagreements and make him into a monster.”