I thought about this some more.

There are very few cultures that do not have either a superiority complex or an inferiority complex (which often results in similar behavior, because the latter will trigger defiance.) This to me is not about "white supremacy" but ultimately about tribalism. My tribe > your tribe. Most tribes will teach this, but some within "tribes" are more susceptible to it than others, and some cultures are more overt / direct in their disrespect than others.

So I think the real question should be: why don't these people from another tribe respect my tribe? I don't have a solution though, except not to spend too much time on these particular individuals and instead seek out those that do respect you.

The other white people also usually speak one language, perhaps less arrogant, but I really don't understand the mindset that expects everyone to speak English - the world is so big, not to mention that English wasn't even a thing before.