Does Christianity consider gender reassignment surgery a sin?
There is absolutely no teaching on this matter either in
scripture or what has been revealed by The Holy Spirit since the
beginning of Christianity.
However, one must look to the teachings of Jesus to find a
possible answer. He made it very clear that it is not what goes
into a body that makes the body unclean. Nor should we worry about
the body, or its appearance, as he compared the human to the lilies
of the field which were beautiful and yet did not toil to buy fine
clothes, a good'image' or a perfect body. Of course he was refering
to things hat mattered in those times, but the general thrust of
his argument is that the body is not important. What IS important
is the content of the human heart. To humans someone like Mother
Theresa might have been a wizened old lady, but to God the content
of her heart made her beautiful in his sight.
To some prejudiced people gender reassignment surgery might be
considered purely cosmetic like a 'nose job' or breast enhancement,
and purely done for appearance. In this case they would see it as a
sin as that money could be spent for better purposes rather than
because of someone's own vanity, and it would not fit in with the
teachings of Jesus (see above). However, the vast majority of
Christians would see gender reassignment surgery far from being
purely cosmetic, but see it as a necessary procedure if someone
feels trapped in the wrong gender and is no different from surgery
necessary for any disease or condition. Therefore it cannot be
consiidered a sin.