atl world war 2

As the title says, what are some other notable post ww1 events which could have snowballed into a conflict that could reach a scale similar to World War 2? This alt ww2 doesn't need to be as deadly as otl ww2, but it should still involve a significant portion of the nations of the world at the time.

The challenge here is to have the Weimar Republic survive and yet still start a Second World War. Germany must remain a democracy (at least on paper), though it can still be a "democracy" in a similar way to how modern Russia is a "democracy".

In the world of Nazi Victories, it is a world without a Israel is very common and something always they. However, why can't they be a Israel? (Not in a High Castle World, but something like Kaiser K TL is the background.) Won't the US and the West would support Israel as a bulwark against the...