I'm not sure, I'd say two things:
- I think "mere difference of opinion" suggests disagreements can't be on serious issues, as if there's something trivial about "x things racism is acceptable a y doesn't". I don't know that I'd agree? Differences in opinion can be on major issues and are important. - Pushing to invade and annex countries is a real thing, which I said in my comment above, I don't know that interferences like Vance in Hungary are pushing to invade countries though? Other things the US doss might be, but I'm not sure it comes into play here?