That's only one part of Asia. Alright, Far Eastern cultures are similar, I get that. But there are many other regions with completely different cultures. You got the Fertile Crescent, the Arabian peninsula, Iran, Central Asia, India, South East Asia, and you get the picture. You won't find this variety in Europe, and that's due to geography. Asia is huge, and as you've said, there are many geographical barriers to allow independent cultural development.
a-Celtic culture no longer exists outside of the British Isles.Then look at Europe. I can assure you that Celtic culture is very very different from Roman culture which is very different from Phoenician culture.
b-Like someone already said, the Phoenicians were certainly not Europeans.
Fair point, but you did not say this in your first post. You only said that Europe was diverse, as if its exclusive to Europe.And the geographical barriers are large enough to create numerous sub-cultures, but not so enormous as to completely isolate them (compare that to the Gobi Desert, Himalayas, Dense Jungles of Indochina). Therefore, you get tension by that exposure among diverse cultures.