I’m not aware of Hitler having Jewish ancestry
But I do think he grew up resentful of Jews where he lived and saw that many were associated with the Mensheviks and Bolshies
Whom he detested
And he acted on that along with his nutty entourage to a degree rarely in recorded history
According to Hitler's lawyer, Hans Frank, Hitler's grandfather was a young Jewish man named Leopold Frankenberger, whose son to Maria Schicklgruber later became Alois Hitler, Adolf's father.
Scholars today discount Frank's story as impossible and say Adolf's real father was most likely Johann Georg Hiedler, who later married Maria and adopted her son Alois.
However, Hitler himself was concerned enough in 1931 about possible Jewish ancestry to order an "investigation" which, not surprisingly, found no such evidence.
So Hitler's alleged Jewish ancestry may be an anti-Nazi or anti-Semitic political myth, but if Hitler himself was worried about it enough to take action, I'd not dismiss it 100%.