The reason for the condemnation by the JW org is that the Bible plainly discriminates against homosexuality.
Jehovah's Witnesses are duty bound not to reason for themselves or question what is written in the Bible. JWs are superficial thinkers, they just blindly follow the text and quote scripture as if by doing so it will buy them their ticket to paradise.
When something does not accord with rationality and fairness and people's well-being; well that's too bad for them! and with a smug superiority they will be pleased to inform you..."That's what the Bible says".
That will be the day when JWs start to think deeply and realize it is this infantile reliance on the foolish, bigoted Bible text which is at fault--- not homosexuality.