Well people accuse others here for racism because they don't rate some players they like(see this thread) so I couldn't really care less about making a bad joke, it's probably my intention too. One of my favourite United players are Martial, Smalling, Rashford, and it used to be Welbeck, Nani, etc., so I don't feel the need to watch who I criticise.
Saying that, I would take Sterling in a heart beat at United, but he is nowhere near good enough as many people want us to believe. He is also getting more than fair criticism for his performances for England, Rooney also use to get it, Carrick, Scholes all used to get it, and not one of them openly criticised other folks for their poor performances as Sterling and his fans did. Smalling is twice the player Jones is, and did he call anyone racist for not going to the World Cup ahead of him?