Having children or not is a deeply personal decision. I don't mock out my friends who have kids (nor my three siblings and my wife's brother, all of whom have kids) by calling them breeders or any other derogatory name. By the same standards, I won't tolerate fundamentalist tripe (be it Muslim or Christian) telling me what to do, based on a book that half the world doesn't believe in.
I think the best thing for people that do not want children can do, is not have them. To really do parenting right is demanding, and requires long committment. I do not think evrry single person needs to have kids. Half assing it is the reason we have problems with feral youths in urban areas right now.
The childfree movement does exactly what you say that you do not. It does mock those who have children and does celebrate abortion and homosexuality.
I don’t believe anyone here is grouping everyone without children in with the childfree movement. These are not people concerned about personal choices, but a liberal group with an agenda. Their agenda is Zero Population Growth (ZPG). Such aims are not in any way compatible with conservatism or freedom, regardless of one’s faith.