You can say to hell with Him all you want, it doesn't change anything.
And killing your child has nothing to do with whether God exists or not, if you don't know that it's morally wrong on your own, then you're a morally bankrupt person regardless. I guess you think it's okay to go out and randomly murder people since you don't believe in God, or do you have to believe in God in order to think that's wrong too? You people have zero common sense or ability to use logic.
Only an idiot would believe that those who oppose abortion only do out of religious principle, anyone with any human fucking decency would oppose it.