My spanish isn't so good but when I read the article my interpretation was a bit different
To me the article said:
"It didn't make me happy to hear someone doped in Roland Garros. It's not official yet but I'm disappointed. I mean after all there are so many controls that just cease to exist on the ATP so I can't understand how someone could actually get caught"
But we must be careful we can't accuse all Argentine players or attack the country. Just Nalbandian. Given his inherent lack of talent it’s the only explanation of why he had so many wins against me. So no, it's a mistake to attack Argentina, the country, saying that all of them are cheaters, it’s just one manchild."
I didn't bother to translate the rest... something about him domianting and players hating but he didn't care because "Yo esté Federer bíatch!" I don't know really what that means??