I suspect that at least some of it would have been a very English form of hatred, which is not really hatred at all but some would-be witty banter/mickey-taking allied with the national pastime of finding pleasure in a bit of mild grumbling.
In that respect it seems as if all groups (groups put together with a nice convenient broad brush) has integrated into Britain in that finest of traditions - the complaining about most things and finding someone to blame. For current reference see most UK national paper headlines! There's always someone to blame. As I said - most people got along fine at an individual level.
Naturally all the problems with society could always be placed at the foot of some other group.. some things don't change.
I was once on a train and overheard the following conversation:
A: I fucking hate the Pakis. All they want is money for nothing. [More about how awful they are, smell of curry, stealing our jobs and women, etc.]
B: What about [Indian name]?
A: Yeah, he's alright.
B: He's from Pakistan or wherever.
A: Yeah, but like, not really.
B: And [Indian name] at work.
A: Alright, mate, alright. I hate the fucking Pakis except for [name] and [name].
Ah, traditional British racism. You hate everyone who looks different except the ones you know. And the ones who run the fish and chip shop.