“Hey man. So you watch football. Which team do you support?” 
“I support Chelsea. I hate Manchester United.”
This is the average ice-breaker I have with most football fans who don’t support Man United. I’m certain this observation will be endorsed by fellow United fans across the world. Over the last few years, especially since Jose Mourinho’s Chelsea reigned supreme over the league for two long years, there seems to be a staunch feeling of hatred towards the red half of Manchester, which is, if I may point out, the most successful English club ever. And they don’t necessarily have to be Chelsea fans. They could be Gunners or Scousers alike. So what if you are crazy about Liverpool/Chelsea/Arsenal? It’s imperative that you hate Manchester United to become a proper football fan, apparently. I have lost count of the number of times I’ve heard something like “Man U sucks” or “United? Sheesh, that team is crap.” Never mind that these were in the middle of a Premier League hat-trick from 2006 to 2009.
When you sit down and give some thought about the hatred, you could probably find one big reason for it. The vast number of plastic fans Man United has. This is a fact which even club legend Roy Keane observed. He remarked-
“Fans? Half the crowd at Old Trafford doesn’t know the first thing about Manchester United. It’s just that, as a team, we only care about the chants that go on while we play.”