There are two sides to this coin.
From God's side, He is beyond time, He knows the begining and the end. He knows what will happen and what will not. This is what Swampy is seeing, not reading the WHOLE Bible.
On our side, we are to REPENT and ACCEPT Jesus as our Savior. We are to WITNESS the Good News of Jesus to the world. We are to be the SALT of the earth. Salt before refigeration, was used to perserve meat and other foods. Without it the food would spoil and get rotton to be thrown out. So, what does it mean to be salt? We must "work to show ourselves approved" and be a good workman. Works doesn't save us, but we are to work, do good, and teach and preach rightousness. This means being against killing, which abortion is one means of killing.