You know there have been wars that jews didn't start, right? World War 1 happened because all the major powers in Europe had become entangled in a web of alliances and at the same time they had each become overconfident in their own superiority. It was only a matter of time before some random dispute spiraled into a large conflict, and that's exactly what this war was. Now the way the war ended, and the insane terms of the Treaty of Versailles, that's where you'll find jews.
However it escalated on account of the German Empire muscling in on the (((Bank of London's))) territory. For that Germany had to be punished and made an example of, hence the Treaty of Versailles