Putler and his rapist ally Trump have been responsible for frauding their own elections

Right but the way that has occurred is well documented in both cases with Trump and Putin, what I am asking here is beyond indirect dark money funding of political groups in Germany (which is definitely wrong I am not defending it) what are the mechanisms of interference that are so grave as to make people question the results of the election?

What are the nature of these accusations? Actual faked votes? "Gerrymandering" style manipulation? Deregistration of valid voters?

I don't doubt that Putin would try to do this kind of thing, not for a second but also when I look at my own country... Putin didn't need to make Trump win, we did that all by ourselves, yes russia threw gasoline on the fire but focusing on that is missing the point of fact that we started the fire here all by ourselves.