Homosexuality; the predisposition to be attracted to the same sex, cause unknown; is not inherently sinful; regardless, homosexual acts are intrinsically disordered and always sinful. There are as far as biological and physical science is concerned no homosexual beings; regardless, there are those who mentally 'feel' they may be or are 'homosexual'...
God judges hearts, man judges actions and legitimately discriminates between which actions are good and which actions are not good...
To wish in a lustful way is a sign of the call of sin. Loving your brother doesn’t have to mean lusting him.