Avrum and DY +1
ZD: I agree that you can probably disagree with Rav Avigdor Miller, Zatsal (at least I think so); but you can’t disagree with the Chafetz Chaim, zatsal, or Rav Shach, zatsal, or the Tosfos YomTov zatsal.
Even regarding Rav Avigdor Miller,zatsal, while you may disagree with him regarding the reason he gives for the holocaust, he obviously was “allowed” to give a reason or he would not have done so (saying otherwise would be a condemnation of him as a person as opposed to a disagreement with his opinion).
In any case, there are enough other sources of the concept.