You could try yank, though tbh I don't know any Americans who are offended by it.
The fact of the matter is though, among left-wing households here in the USA those same jokes are rampant. That doesn't mean the entire nation believes it, nor does the fact that left-wing households in Germany do the same mean they speak for your entire country. So far it's been 2 years of investigations by congress, the media, AND the FBI and NONE of them have found any actionable evidence that the President colluded with Russia. Your "jokes" are not reality, and your social circle is not the entirety of the world, sorry to break it to you. Norwegian lawmakers and the Prime Minister of Japan have both nominated Trump for the Nobel Peace Prize, and the president of South Korea has said he'd support such a nomination. The opinion of some brainwashed German civilians in the heart of anti-trump EU is UTTERLY irrelevant.