I can't recall any serious problems between United and Dulwich before a London Senior cup match in 1983-4. United were struggling at the time and with several new players were given little chance of winning away. However a fine performance and a late goal from Stan Alexander gave us a 1-0 victory. Instead of graciously accepting the better team had won Dulwich complained that we had fielded an ineligible player. The London FA found in our favour but Dulwich then named another player they claimed was ineligible and this time the London FA  ordered the tie to be replayed. This infuriated not just the supporters but the club's officials who refused to replay and resigned from the London FA.  There may be other reasons for hating Dulwich but that is where i began.

No Al, gotta agree with him I'm afraid but I'd have to expand it to any teams in the Manc area (although I'd possibly make an exception for Stockport of whom the Terrors had a great hand in their downfall - they were never the same after we allowed them to sneak past us in the FA Cup)