That's part of it. Of course, a lot of people also hated it because they just thought the music was horrible. One friend of mine complained that he thought it had no soul to it.
That reminds me...one of the things I find amusing about "Saturday Night Fever" is that John Travolta and his little gang come across as so tough and macho, and they're all rather racist and homophobic, and yet they dance to music comes from both black and gay subculture. Go figure. Another funny moment was in the movie "Detroit Rock City," in which those kids on their way to a KISS concert in 1978 have a run-in with a couple of macho disco guys, and the KISS kids beat them up and put KISS make-up on them, and once disco guy says to the other, "You got the fag make-up on." I wonder if any disco fans who were like that back then ever noticed the irony.
Lil' Pete said:
I'm too young to appreciate disco's hey day but from what I've read, a lot of anti-disco mentality at the time had to do with society being rather racists and homophobic since disco was born of the two subcultures in America.