Looking back over our recent history Great Britain has a lot to be ashamed about. We were heavily involved in the slave trade, we exploited our empire colonies, we got Hong Kong on the back of the opium wars with China etc, etc.. If you look at our past we were a nasty lot.
Yet, today people want to come here! People risk their lives to cross the English Channel on small boats. In many ways we treat people of all races and colours equally and fairly. We are nowadays a very fair and reasonable people. We are far from perfect, but given a choice I am quite happy living here.