You make a fair point, I can't really claim to know what's going on in his mind either. But there is no doubt that the DNC establishment falls on the EU side and Biden having made statements that border on blackmail doesn't necessarily bode well in any case:
An American President going on about his ethnicity while at the same time clubbing together the most identity-politics cabinet in US history is pretty yucky in my humble opinion. Can you imagine Trump weighing in on Germany's side (which he never did) because of his German background?
I guess we'll have to see what comes of all this.