I view this to be about as morally compelling as vegetarianism. It's like eco-terrorism, it just doesn't hold water. The soul doesn't enter the body of a fetus that has no brain and is indistinguishable from a chicken at the same age. If it is a sin then killing chickens must be a sin too. You couldn't tell the difference if you saw them side by side.
As to hate and compassion, the proof is in the putting, public child-care services for living children are almost non-existent in the red states where abortion would be illegal if they could make it so, but in the blue states which keep abortion legal, child care services are abounding. I think it says just as much about how you deal with the living, and what the conservative red states have to say is that children don't really matter.
Conservatives just don't think about the consequences to young people. I know first hand, my birth destroyed both my parents lives. They were WAY to young to have a child and I ended up being raised by my grandparents. But of the three of us, it was by far the hardest on me. I feel that if I had been abort I simply would have incarnated somewhere else, no big deal, God can't be thwarted. This whole notion that God can be thwarted and a child fail to enter this world at God's command seems lacking in faith to me. God cannot be thwarted, if He deems someone is getting in that child will get in no matter what. With abortion, the odds increase that that child will be born to a loving home that really wants a child. The alternative is an ugly reality that people around here aren't interested in hearing about.