inspired by this thread.

Logically Europe and Asia are a continent, but why do ppl from Europe hate this idea of EuroAsia, do they see themself more superior than the Asiatic countries?

Same goes abt N. America and South America.

No, they are because I was taught that way.
Eurasia is used though.

They're separated because of the Ural Mountains and because of the Persian Wars with Greece which began the whole East vs West debacle. I don't even think of it racially because there are lots of Caucasian people in Asia and some Asiatic tribes in what is considered Europe (in Russia for example).

Different culture, history and Eurasia has a huge ass mountain range in the middle.

It's because of culture differences and history.