It wasn't, Hank.
I don't agree with the way you see it. The fact that we have people in this country of different 'colour' does not dilute England at all. Tolerance is an English value and a principle which has helped make us what we are.
From my personal point of view, I fell out with England the football team when it started to become commercialised. Gascoigne, the f***ing idiot, crying and wearing a pair of plastic tits and all the daft idiots with no interest in football suddenly latched onto it. I loved England, the team, in the '80s, because it was a genuine then rather than fashionable. In those days, football fans were scorned as opposed to today when every idiot and his dog has an opinion on the game and matches on a Saturday. The commercialisation of the game killed England the team and to an extent league football, not multi-Culturalism - in my opinion.
Everything's Germanic if you want to take things back to the start.
But, actually, our language is a mixture of French and Old Norse. French and English ran alongside one another after the Norman conquest, so we have two words in our language which mean the same thing, for example: chance is French; luck is Old Norse.
The Germanic tribes migrated everywhere so you could say that everyone in Central and Western Europe is Germanic speaking a Germanic language, but that's not really what you meant and you were wrong. Our language as we know it is as much French and Old Norse as German.