Being Jewish is an insult in many Muslim societies so people accuse it about people they don’t like. I remember when the commander of the IRGC navy said that the Saudi royal family are descendants of Jews. I have heard that some Islamists have claimed that Ataturk was Jewish.
In the Arab world, and in the Muslim world,
when a man wants to attack and discredit his political opponent,
he accuses his political opponent of being a Jew.
Or even worse, he accuses his political opponent of being a spy for Israel.
I never heard that claimed about Erdogan. I think that some Islamists claim that about Ataturk.
With regard to claim of the IRGC commander about the Saudis, I see that the Jerusalem Post had an article about it. He seemed to be trying to connect the Saudis to the Jews who fought the early Muslims in Arabia.