Rav Mordechai Eliyahu ztz”l used to say that the Holocaust was the War of Gog and Magog, as it is written in the Gemara that the Holy One Blessed Be He could consider Hezkiya to be Mashiach and Sancheriv as Gog and Magog, but the sin caused this not to be so (Sanhedrin 94).
If so, it’s possible to consider the Holocaust as the war of Gog and Magog. We have suffered enough.
Rav Eliyahu related that someone argued on his view and said that his words were not correct and that the War of Gog and Magog will be coming in the future, and he brought all types of proofs that it had not yet occurred.
The Rav told him: “Whoever thinks that there needs to be a War of Gog and Magog will be in this war, while those who hold that it has occurred already will be exempt from it.”
— From the book Besha’ar Hamelech