Enjoying your own victory is not schadenfreud. But it can get to be gloating.
According to this study, occasionally indulging in schadenfreude actually "contributes to good mental health."
LOLOLOL, ARClight--relax and enjoy good mental health today!!
True, but laughing at the rants and expressions of misery from the DUmmkopfs might qualify. (Personally, I'd just call it a natural reaction to a ridiculous spectacle, rather like amusement at Groucho Marx as the leader of Freedonia.)
That said, I'd make a distinction between the DU fanatics and the regular Democrat rank-and-file who are honestly misguided. I wouldn't dream of mocking the latter (for one thing, it would make them defensive and less likely to reconsider their errors).