Bautista's on steroids, Granderson changes swing.... ?

Yeah I know Jose Bautista never hit more then 16 home runs in a season then magically hits 54 and every one assumes its steroids. Curtis Granderson career high is 30 and suddenly hes hit 21 before the all-star break, buts thats because he changed his swing? Bautista hit 54 homeruns last season and 25 so far this season but every non Jay fan assumes it roids. consistent playing time, he changed his swing and put in a LOT of work is how he managed to became one of the best hitters, he gets tested like everyone else and never tested positive. But when Granderson hits home runs everyone says its because of his swing and how he changed it. This is because he plays for the Yankees ? Yankee fans have such a hate for good players who dont play for there team. If Bautista played for the Yankees all of these Yankees fans would say nothing about steroids, same thing if he played for Boston. Why is it that people assume hes on roids and Granderson just changed his swing? It makes no sense to me.