The FA accepted that there was no racist intent in Bernado's tweet, as they did with Garnacho's....i find it hard to believe that there was a conscious decision to punish Bernardo "because" he is a City player....and a conscious decision not to punish Garnacho because he is a utd player.
I think that in Bernados case they looked at it and wrongly decided he was guilty of being racist. I then think in Garnachos case they looked at it and decided, correctly, that he didnt intend to be racist.
The difference is that they let off the rag, so I think you're deluded if you find it hard to believe that we are treated differently.