If you believe the US that colonized part of North America is the same as post-ww2 US, then I can understand.
I don't think they're the same, so many institutions were established that over the years that I don't see them as the former colony of the British crown.
But hey, if you want to discuss semantics, go for it.
Yeah, when you draw arbitrary limits (30 years for you it seems), it's easy to paint one side as the better one. Once you start to think a bit bigger, you start to realize most big nations act as the others, and it's just different flavors of "bad", yet they're all as bad as the others.
What about segregation then, is that recent enough for you? Or that wasn't about culture/language, so that too isn't applicable? I'm afraid that with rose-tinted glasses, everything has an explanation why your favorite is different than their favorite.