You are aware that London is one of the top ten most multicultural cities in the entire World, yes?
You are aware that London (along with the other English cities) of note) voted overwhelmingly to remain and that many (if not most) of us would be only too happy to see it secede and rejoin the EU as an independent city-state, yes?
You understand that when people who aren't from London and know, therefore, absolutely nothing about it, talk about 'London', what they mean is 'the Palace of Westminster', not London at all, right?
So, you'll appreciate that your portrayal of London as racist, xenophobic and hostile to immigrants is laughable ... a portrayal tha is, itself, the product of ignorance and bigotry.