LGBT

Angels are made by God, and they are eternal. They don't need to have male and female angels who have sex to make baby angels.
And in heaven, angels deal in the energies of love; giving and receiving love to each other in an energetic exchange.
So, for an angel who has no sex, this whole thing is irrelevant. Once an angel has breathed a soul into the body of a newborn infant and takes possession of that body, the angel can find his/her self attracted to the same sex because of their memory of a sexless life as an angel.
This results in many angels giving and receiving love for each other regardless of the 3D sexuality of male and female. It's simply the energy they are more comfortable with.
It's not a sin in heaven, nor is it a sin in the eyes of God. Only in the eyes of humans shrouded in darkness is it deemed sinful.
The true sin here is in the hate and violence inflicted on homosexuals.