While I don't know a whole lot about traditional dancing (my forte was figure skating which, while it incorporates dance, is not dance), I will make a comment on the tone.
"Dance with girls next time. You might like it." Uncalled for. Out of line. Irreverent, homophobic, and asinine.
The criticism leveled at these men was not just for their dancing skill, but for their choice of gender. The judges should be suggesting ways to improve, not blasting these people with vitriol.
Then again, I cannot stand the culture that gives Simon Cowell lots of money to be an asshole, so none of these shows are very nice in my book. I watch none of them, and would rather tear up my money than spend it on them.