Because these are countries that share some really great values like a belief in human freedom, democracy, and free markets. We share a taste for competitive capitalism and individual initiative. Our foreign policy goals are very aligned. It would be the most powerful and rich bloc in the history of the world. Why wouldn't it be a good thing?
> Because these are countries that share some really great values like a belief in human freedom
The head of state of the UK is an unelected monarch. The upper house is life peers and Anglican clergy. What kind of "belief in freedom and democracy" is that?
> We share a taste for competitive capitalism and individual initiative.
You... don't actually know anything about the political history of most of the world's English speaking countries, do you?
Yes, they keep the Queen around for the tourists. The monarch wields zero actual power in British politics. Sure, the House of Lords is unelected, but it's only still around because it works so well that no one has convinced the House of Commons of a better alternative. Also, they can only delay legislation, not stop it all together. Is that really the best you've got against the Brits?
And what about their history? I know full well that the UK, for example, has dabbled quite heavily in socialism. They're also one of the most resilient people on the planet, up there with the Jews, and they came back from that with a vengeance.