Oh, NO DOUBT that's why Rafa gets so much hate. Many Fed fans have cult like behavior, so they can't accept that he isn't the invincible, best ever player they had taken him to be. Now that Rafa's close to his records, they're panicking. And Fed's panicking, just see his ridiculous criticisms of Rafa, and his crazy happiness about Stan winning (sure Fed, it has nothing to do with injury keeping your record this far).
I do think however that their hate has to do with some sort of jealousy for his personality, for his kind, wise character. Petty people feel upset that this makes them feel inferior.