Definitely true for tribal politics though.
Sure, there have been quite a few unfortunate and well-publicised outlier cases of people situationally caught between bureaucratic cracks, but as someone who lives in London, I assure you that thousands of long-since immigrated grandparents aren't getting booted out to satisfy some arbitrary ‘anti-immigration’ whim.
It's a mess for sure, but I'm not sure it's as you appear to be trying to paint.
But more importantly, we don't want to be living in a country in a downward, inward decline. Brexit isn't going to solve the problems that disaffected leavers voted for, and I think it's going to get worse - Britain may get even more virulent demagogues. If we have children, we don't want them to grow up in an illiberal society, or be educated in this kind of a system.
Things aren't great elsewhere either, for sure. That's why it's so fascinating.
Great you say, more jobs for the English. But now the businesses have to pay a higher wager and/or increase their costs which are passed down to us. Now we have to pay more, but we aren't getting any extra money and due to austerity it's even worse.