Rav Mordechai Eliahu ruled that WW2 was Gog uMagog. When some people tried to convince him otherwise he told them that if they continued to disagree with him they would have to experience it. They withdrew their objections.
This has the troubling implication that the identity
of an event in a nevuah can actually be subjective,
i.e., if you don’t think [event X]=[nevuah Y], the nevuah
has not happened for you and still has to happen, but if
you do think so, then as far as you’re concerned, it is.