We didn’t see much diversity in my little village in the 1970s and the people who weren’t White British were very much part of the community. Not much racism either, although my parents would have made sure we weren’t exposed to it and I wouldn’t have noticed microaggressions anyway. Did work in factories in my teens where there was a large Asian workforce (mainly female) and began to notice it then (put down to “banter” of course 
), then much more doing bar work.
DH, from Greater London, was much more aware of it. Had friends attacked during NF rallies for protesting. There was one school friend of his who was apparently a lovely little boy, who turned into the most racist scum imaginable and I had the misfortune to witness that. We never met up with him again.
I won’t say I’m ashamed to be British, because there’s a lot to love about my multicultural city and no EDL wankers are going to make me apologise for anything. I will say they don’t represent me, the Neanderthal twats, whether they are throwing bricks torn from garden walls or smarming in a suit on the BBC.