Well, OP I think attitudes are different everywhere.
I'm angloasian and well into middle aged. From london but we moved out and we were probably the first asian family in our area and at the school I went. People - no issues - they just thought us exotic and I cannot tell how how popular I was at school as they'd never seen anyone like my mum and thought she was lovely and all the boys were in love with her. Primary school however - fuckers - but back then labelling was pretty common. My df (who is the english one - mum is asian) went ballistic on my first week when he got a call saying he had a problem and that I couldn't write in english and could only write in 'indian' (lol) - he had to point out I wasn't writing in 'indian' but I'd been to a school in london and had been taught to write ITA (phonetics for kids type thing).
However, in the streets we got horrible looks from other asians - and still do. So it certainly works both ways.
I was at senior school when the skinhead thing started - loads of skinhead girls - they'd call people horrible names but even I could see they thought they should be doing it and they didn't even know the meaning of half those words. Most of in mixed marriages now!
I don't look particularly indian at all. Why on earth should I - I'm from a mixed background. That annoys me when I certainly don't look english (whatever that is) and so they feel they must ask and then point out that I don't look Indian. No shit sherlock - why should I - i'm MIXED. I'm usually mistaken for an iranian. Don't care.
I also find that in the asian culture that if you're mixed but with an indian father you are somehow more indian than if you have a indian mother. I just laugh. I've seen it all, heard it all and I'm pretty much indifferent to stuff these days.
I've not had many racist comments but as my parents are now divorced I've had from both communities and assumption that my nasty white father somehow took away my mother's 'honour' and then left. LOL! Nothing like that at all - grew up in a very middle class family ta and both parents together until I left university. Then they both bolted in different directions! I also went for a job - they were initially chasing my application - where halfway through the interview it was clear they thought I was muslim and it just changed. I was gobsmacked at the ignorance of so call high class, educated people.
Just like life. Everyone has a huge potential for ignorance - not just one community.
My dh is from another european country - try going there - jeez! I'm brining up my son to be everything and none of his backgrounds- a world citizen - to me it's just a passport and family background stuff. Nice to be able to mix with lots of people and understand the lingos. And honestly his mixed background in my view is what makes him British as opposed to his other heritages - you get all sorts of different backgrounds here that you don't get in other countries.
My view is fight racism where you see it but I certainly don't have a view where I preempt possible racism.
That's my experience of growing up as a mixed person. I'm pretty sure that the many people of mixed heritage of my age and the younger generation may not recognise my experiences as we are all different - from different parts of the country - different parents, different economic backgrounds etc. Just like my non mixed fellow countrymen.