Doesn't Qatar have like actual slavery and support terrorism? Yet FIFA losing their minds over Trump but have no problems with the Putin apparently.
The US will be just fine without the World Cup..
As others have mentioned, I don't think its as much about Trump and more about the US investigations on corruption that has put many officials in hot water. I think its a grudge they have and if there is more money going towards official pockets, they'll happily vote against their self-interest.
If I'm not mistaken, every official has an equal vote, so Germany has the same exact say as Guam. This means that if you are looking to corrupt agents, just go for the small countries that don't have much at stake and collectively sway a decision one way.