So far there is not much Trump as done in regards to foreign policy that I disagree with
Except for culturing a situation where one of our closest allies justifiably doesn't trust us to help them out, even in straightforward ways, in the biggest international crisis of the last 70 years, you mean.
We've come a fucking long way from the Berlin airlift, huh? The biggest disaster isn't Trump, really. It's the realization that his poison goes so deep in the american psyche. No one will think of us the same again.
Offer a few thousand green-cards at random at embassies around the third world.
You will be forgiven in less than 5 minutes.
Basically, we used to be the teachers in the schoolyard. Now we're a ramshackle fort of sneering kids trying to keep people out of "our" stuff.
That is not the lens I am seeing it through.
Rather, where I live NO ONE could care less about your world leadership or whether you are or ever were the teachers, blah, blah, blah.
All of us out here will bitch and moan about the USA, but give anyone of us a ticket to the USA (especially if our family can come along) and we'll take it in a heartbeat.
You aren't our teachers, you are the bank.
Seriously.
The story, really, isn't about truth. It's about trust. The German government clearly does not trust the USA to share a vaccine. And why would they? Everyone who's been watching US foreign policy for the last three years knows the "America First" bent of its chief executive. They know the kind of xenophobic stuff that gets said on its "state television station" every day. They can read polls, and know that the political base of the ruling party would genuinely cheer for a situation where the USA had exclusive access to a vaccine.
So they don't trust the US to control a biochem company. That's a problem, but it's not a problem with this particular event (realistically we're going to get a ton of vaccine variants from different labs -- vaccine development is hardly rocket surgery, as it were). It's a problem with the way US (really republican) foreign policy has been positioned in the modern world.
And it's kind of a disaster.