You seem to be verifying what I said.
There is a serious difference between saying negative things to/about someone and being rude. Learning that is one of the things that happens as people grow up.
Telling someone to their face that you don't like them does not show that you have anything other than a severe lack of tact. That is not honesty. At times, it can be straightforward stupidity.
There are very few people that I/we loathe. There are certainly plenty around that I would rather be somewhere else than next to but that is not the same thing. Loathing implies a wish to harm. One of the last times this country wished anyone harm, our prime minister obediently followed your president into Iraq. That was one of the most amazingly stupid things ever done by a British leader in centuries. We are now living with the consequences. I want us to go back to not loathing as soon as possible!
As for the empire, my ancestors gave it back to the peoples that their ancestors had taken it from. On the whole, we are still on good terms with most of them.