Earlier quoted context omitted.
The link between brexit and what? Also, why do you think brexit is not a bad idea?
Kind of for the same reason the American Colonies split from England.
Kind of, except in reverse. UK had a lot of power in internal-EU politics. Now it won't. ¯\_(ツ)_/¯
It had the right and power to implement its own immigration policy. But it turns out the UK is so racist it doesn't even want to grant citizen status to those it had already granted to in law but then failed to process them.