That "Blue Cat" guy is well-known on Chinese sports forums... And from what I've been told it's not the first time he writes disgusting things about Federer... And, yes, he's a self-professed Rafatard ... Which doesn't mean all Nadal fans are nutcases btw!
If you've been reading posts by extreme Rafatards, this is not a surprise at all. One of them is actually called Rafa=Fedkilla and he is well loved by all rafatards...
"Pray for death" was Clay Death's signature, a banned poster who posted a lot here, but he was rather a nice guy, not disturbed mentally like Raferminator or Start Da Game. You know all that fighting, "Sparta" vocabulary, among a few Nadal-fans and fans of other players.
He was disturbed all right... He was abusive, had a disgusting fetish about animals piss and shit, he actually believed he was a general he referred to himself as Clay Death the Destroyer... He's also last year's ACC finalist and should have won the thing. The biggest diva this site ever saw.