I think the mistake most of us make is not acknowledging we do not have one culture but many cultures. Some clash with others. Some exist in the same geographic areas. It's a mess and I don't think this is acknowledged very often.

Historically geography played a much strong role in limiting the clashing of cultures but with wealth and transportation that's no longer a barrier. Then add the Internet and you can export culture globally.

I don't think humans have accepted this consequence of the Internet fully.