When I see people getting hung up on Rothschild...

Fractional reserve banking was a significant development, sure. But it's not like he had invented something uniquely complex, like a formula for the cure for cancer, and he had it all in his head and never wrote it down, and if you wanted the cure, you had to pay him whatever he asked, and he'd go behind a curtain and make some for you, where nobody could duplicate it and the secret would die with him.
Fractional reserve banking is a bit counter-intuitive and abstract, but it's nothing that anyone who can handle high school algebra should struggle with for long. Nor was it an unobtainable secret.
So once you understand the basic idea that is making him such a big shot, and he's trying to steal your country, why wouldn't you just kill him and have your own people do the same thing?