De-criminalizing an immoral activity is the same as supporting that activity.
That’s like saying, “I don’t believe in abortion, but I don’t believe in criminalizing it either.
N.B. Both abortion and sodomy are mortal sins.
It’s not just immoral, it’s a highly destructive behavior. Destructive behaviors damage societies when they are unrestrained. No healthy society encourages them.
I used to wonder why so many protestants fixated on this sin over so many others. Now I see they were right to.