Art Katz, a Jewish believer in Jesus, said that the Jewish Holocaust was a judgment of the Holy One of Israel on His people. I shall not discuss Katz’s Holocaust argument here (I’ve done that elsewhere).
In one of his talks, “Jewish unbelief,” Katz relates a lecture he attended in New York by a Jew, Gabriel Schoenfeld, on the “new antisemitism.” Schoenfeld wrote elsewhere on the same topic:
“We are thus confronted with a deep irony. Will one of Mel Gibson’s achievements be to breathe fresh life into an anti-Semitic tradition that has been dying out? If so, this self-styled conservative and American patriot would be in effect joining forces with Islamic radicals and the most extreme elements of the European and American Left.” (Gabriel Schoenfeld. “Is European-style anti-semitism coming our way?” National Review online, March 5, 2004).
In the lecture, said Art K, neither Schoenfeld nor any of the audience during question time mentioned God. There were many yarmulkes (Jewish scull caps) and at least a dozen rabbis in the audience. Katz asked a question: “Has anyone in attendance considered the possibility that antisemitism was a mild (sic) and preliminary judgment to turn attention to him who has suffered gross neglect from us as Jews…don’t we have an obligation as Jews to be mindful of our God and to have him known?”
Schoenfeld replied that such a question was not scientific and thus he did not know “how to factor in” such a question.
Not all Israel (from Moses to today) will be saved, for God has mercy on whom he wants to have mercy (Deuteronomy 33:19; Romans 9:15). Does that make God an anti-semite if he condemns some Jewish atheists to hell? I say some because, recall, God has mercy on whom he wants to have mercy.
 And I heard the voice of the Lord saying, “Whom shall I send, and who will go for us?” Then I said, “Here I am! Send me.”  And he said, “Go, and say to this people: “‘Keep on hearing, but do not understand; keep on seeing, but do not perceive.’  Make the heart of this people dull, and their ears heavy, and blind their eyes; lest they see with their eyes, and hear with their ears, and understand with their hearts, and turn and be healed.”  Then I said, “How long, O Lord?” And he said: “Until cities lie waste without inhabitant, and houses without people, and the land is a desolate waste,  and the LORD removes people far away, and the forsaken places are many in the midst of the land.  And though a tenth remain in it, it will be burned again, like a terebinth or an oak, whose stump remains when it is felled.”
(Isaiah 6:8-7:17 ESV)
No, the Holy One of Israel is not an anti-semite; neither is Isaiah – nor Art Katz, nor moi.
For further discussion see God’s corporate election of Israel and individual election (Jew and Gentile) and Will all Israel be saved? Of course and of course not.