i think homosexuality -- and heterosexuality for that matter -- are seen as an evil, or a nuesance, in the spiritual world because they are concerned with matters of the flesh, they are earth-bound, they are centered around attraction, desire, and sex, they are centered around animalistic instincts, as well as self-gratifification and pleasure
if the mind is preoccupied with the body then it has no time to be preoccupied with the spirit, therefore all preoccupations with the world are sinful, and destructive to the soul
but some people are just fine limiting their spirit merely to the physical and temporal, and they have the free will to do so