Christians say 'no' to various expressions of sexual sin not because we are pinched, uptight, narrow, and unloving. We say 'no' to counterfeits because God has a greater 'yes'! The real thing—God’s great, brilliant plan for sexuality.
Infanticide is the same bigotry as racism aimed at different victims. It is now considered a respectable and debatable proposition in bioethics. If we don’t keep pushing back very hard, it will, one day, become unexceptional.