But what didn't happen, didn't happen. And what happened, happened. We use the Torah we were given, not a hypothetical one that we make up on "what if's"
"What Ifs" are a far from vapid part of history study, and from them we can reverie about the pending Messianic Future, which is essential for the wellbeing of the true Jewish psyche.
The way the 2 Moshiachs handle their future conquests is far from set in stone, and Hashem has innumerable "WI" scenarios, as R.Kahane would empasize, ranging from glorious miraculous Jewish victories, to miserable equally unnatural defeats, depending on our merits or demerits,
right now.