Try moving to New Zealand. I hear that some towns in the south island are like England in the 1950s if that is what you are seeking.

I don't feel it's not England any more. I know a few foreign people in my neighbourhood and I get on with them, I treat them as equals.

In a couple generations, those people will be English, yes?
In my neighborhood in Germany, there are tons of people whose parents immigrated from Eastern Europe. But they all grew up in Germany, they speak fluent German, I just see them as Germans with a migrant background.

England has always been a country colonised and ruled by immigrants.
The very idea of England is foreign. The Romans, Angles, Saxons, Jutes, Viking, Normans.
We could go on, unless you are a Cornish, Welsh or Scottish Celt (and they may have been colonisers) you are descended from immigrants. I see no difference

Dude

I wonder if the people from the places colonized by England thought the same way?
"Say my man, this doesnt look like australia anymore with all the English walking about like they own the place"

You can always try moving to an old colony

Not really, the true Britons are a minority

Don’t you live in Guernsey?