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This is typical lefty condemnation of your own countrymen.
You say "you just think its hypocrisy to have an Empire that oppressed so many people abroad and murdered and yet complain about foreigners",
If we hadn't acquired an Empire, there where many countries around the world that would have jumped in, and perhaps their Empire's people would have most likely have faired much worst under them, after all our Empire was created out of trading and exploration, and we did not murder either. In fact it was us that were murdered, have you not heard of the Thugs of India, or the Mau Mau of Kenya?
We were invited into India to trade, and it suited the despots of India to let us colonise their sub continent, with the wealth of our inventiveness from our industrial revolution, building schools, bridges, dams, railways.The same could be said for Africa, but the problem with Africa is still the same now in the 21st century.
It is amazing though, they all wanted to get rid of the British, and what happened to their countries? They went to the dogs after we left, so they all came running to settle in Britain, they still don't like us, but we look after them, better than our own.