Coolfonz, you are a left-winger and you share the views of left-wingers. I am more to the right and therefore see the world in a different way. You say
"Humans eat food, dance, pray, dress, entertain themselves etc. The idea people have separate cultures is by its very nature, separatist."
We all breathe, but that doesn't mean we are all the same. We have different cultures. It is not separatist, it is reality. Communists would like us to be one world under one system, "workers of the world unite", that is why they wanted to stamp out national identities and religions as they created their communist empire. The communists want the same as the capitalist globalists want, one global world where we are all one world citizens, and where we can all be easily controlled by either the communists or the capitalists. Neither of them want us to have individual freedoms or individual national identities, they want us to become uniform, to all be one, to destroy our diversity, so that we are no longer 'separatists'. That way we are easier to control.
You also say
"A rich Oxford educated member of Pakistan's elite has more in common with a rich Oxbridge educated member of the British upper classes, than a rich Pakistani has with a slum dweller in Karachi.
A miner in China has more in common with a miner in South Africa than the Chinese miner has with Wen Jiabao."
The Oxbridge educated member of the Pakistani elite, such as Benazir Bhutto for example, will share many things in common with a member of the British elite, precisely because she will have been educated in our culture. This is the reason why Russian billionaires send their children to Eton etc. to pick up some of our culture, rather than sending their children to the top schools in Moscow where they will be in the Russian culture. But I think this is not a good example.
A member of the Pakistani elite at a top university in Karachi has more in common with a poor person in Karachi than they would have with a member of the British elite. It has nothing to do with class or money, it has to do with culture. The elite Pakistani will speak the same language as the poor Pakistani, will share the same faith, the same customs, the same history, the same television programmes, the same Pakistani literature, the same Pakistani music, similar Pakistani food etc. They will probably like the Pakistani national sport, adopted from the British culture, of cricket as much as the poor Pakistani. The British elite may like different sports such as Rugby, will enjoy different pastimes, eat different food, read Shakespeare and other English literature, have a different faith, speak a different language etc. It is these cultural differences that make even a rich person a stranger in a foreign land, because money or class is irrelevant, it is culture that can make a person like a fish out of water in a foreign land.
Similarly the Chinese miner will have far more in common with Wen Jiabao than with a South African miner. The Chinese worker is not defined by their work (which communists see as the all important factor) but by their culture, history and customs which are far removed from the South African ones.