Many Brits are turned off by sour milk, head cheese, tripe, jellied pig trotters and black pudding (kaszanka) a to mention but a few.
Many may be,but your mistake in that list is that everyone of those has a native British equivalent.not sure about "sour milk" though,isnt that just off milk?ie,nasty smelly stuff that aliens get drunk on....
But thats another thing,those would be considered "national" food in Poland,in the UK they would be far more regional, Black pudding would be North West england,Tripe seems to be a Yorkshire thing(tho Id never touch it! )jellied anything seems a london thing and,well,we have more types of cheese than the french so....
Poles IMHO seem to be far more reluctant to try new foods. Lets just look at how popular Polski Skleps still are over here. There isnt a small town or neighbourhood in the UK that doesnt have a Polski Sklep these days,even TESCOS still has a Polish foods aisle.
Of course,flip side is all the Brits who go on holiday to Spain etc and eat "English breakfasts " every day and stick to pub grub rather than local stuff.....
Id still say us Brits have the edge on a far wider cuisine,"exotic" in warsaw seemed to be pierogi Russian style......where as for the last 40 or 50 years here in the UK its been normal for a weeks worth of meals to have come from the 4 corners of the world, Spag Bol on a Monday,Curry on a Tuesday a kebab after work on a Wednesday, etc etc,Sunday Roast is about the only "Native" Dish regularly eaten so....
Who knows,in the end its one of those questions that will go round and round. Im not keen on many Polish foods but the ones Im not keen on are like the ones you mentioned,fatty greasy slimey stuff I dont eat here or abroad but elsewhere I always eat and drink Local ( and smoke too,always buy the local cigarettes) and will try anything once,but my hypothetical english neighbour( I do have one...just,you know..) might be the type who never touches any foreign "muck" and always packs some cornflakes and some bacon rashers in his holiday suitcases :)
please try not to get around the filters