Not to quibble my day away, but the definition of cosmopolitan is "*including or containing people from many different countries. *". That's why those societies are called 'cosmopolitan'.

What's happening now is an attack on our society by introducing non-compatible elements that are tearing it all down.

There will undoubtedly be humans left after our current society is destroyed, but it's not going to be anything like the people promoting moral corruption are expecting.