IMHO, the larger sin is of our brethren believers who find it more reasonable to condone homosexuality simply as a comparative alternate lifestyle, instead of immediately condemning it as a sexually immoral perverted unrighteous way of thinking. They tend to be the same believers who also accept Islam as simply a comparative faith, living in a Judean-Christian culture, but not turning their thinking to the mind of Christ.
To speak against the sin while championing the sinner is an art. It is not easy.