As to the salvation of innocents - God is merciful and just. No person will be in hell who did not consciously reject God's grace to be saved. That excludes "unbaptized" babies that die after birth or through abortion. There were some early church fathers who DID teach that babies who died without baptism would be damned, the Catholic Church has changed her doctrines on this over the years. They came up with a fictitious place called "Limbo" in order to console those who lost babies through miscarriage. I do not believe such a place exists but that ALL innocents go directly to heaven at death.
To say such a doctrine "encourages" infanticide or abortion is the height of cynicism. Murder is murder and God will judge it. Anyone who would kill their own child under such an idea is mentally unbalanced in the first place. To contend Satan would NOT want abortion if all babies went to heaven, is also a strange idea. Satan thinks he is god, the first born are always dedicated to the true God, most first abortions ARE the first born child. Satan is a "murderer from the beginning" and ALL that he tries to do is to usurp God's will and plans. I think Satan thinks he gets far more out of abortion than to care that those children go to heaven. I have no doubt that they are covered under the mercy and grace of God, because He IS merciful and they are innocent.
Then you don’t believe in original sin? Which sect do you belong to?
Again, you are not thinking this through. Saying all aborted children get to heaven makes abortion a net good. Not all of them, if they were born and grew up, would be saved.
So if then why be pro life? It is like the popular (and wrong) statement that those who die in a public and horrific way (think the Twin Towers) get a free pass to heaven.