Multi-culturalism has been an absolute disaster in every country that has allowed it. The majority of humans are not evolved enough yet to coexist when cultural values are so different. Maybe one day, but not now.
Multi-culturalism has only resulted in bitterness, envy and division. Before all this started, people would travel to a different culture, do as the Romans do (fit in with the local culture, for those who don't know what that means), enjoy the experience, and leave. If they chose to stay, they'd adopt the local culture. Nowadays, people try to import their cultures, set up camp and go about destroying the established culture. It's really F'd up.
