Wondered when you would put in an appearance Paul?
Perhaps we are talking about different aspects of generations, on that assumption (please note
@JPRouve).
I am talking of ten year periods, possibly 70's but definitely 80's, 90's, 00's in fact right up to Brexit in 2016, any attempt to open up debate around immigration/asylum either aroused no interest whats so ever, or was shouted down at meetings. I was still a member of the Labour party then and remember someone trying to raise a question from the floor, which a local MP slammed down as out of order.
Also of course Gordon Brown found to his cost when an old lady in Rochdale asked him about immigration, as I remember a fairly innocuous one, Gordon went on to allow his statement about 'bigots' to be overheard, from that point on with the Tory press in full cry everything shifted up a gear!