I know this goes against the grain, but I don't mind Leeds or their fans.
That is the 2020 Leeds fans, their counterparts in the 1960s and 1970s were something else. I really used to hate Leeds supporters back then.
The dialogue from Red Dwarf summed it up:
AR medieval King: Good Knight, bring me this knaves head on a silver platter
Lister (of Smeg): hey, steady!
AR medieval King: Then disembowel him and feed his innards to the crows
crowd cheers
Lister (of Smeg): This is worse than playing away at Leeds.
However, Leeds fans back then are not Leeds today. They were at the Etihad a few years back in the FA Cup and there were no problems. I worked with a couple of Leeds fans and they both hated United and neither had a problem with City. They didn't ahve that much time for Liverpool but nothing like their animosity to United.