God knew who we were and what we would become when he called us to be His children. We either are or are not a child of God. I may have failed at times, but I always tried to make my physical father proud of me. I also try to make my spiritual Father proud of me. Like my physical father's love, God's greater love is able to forgive my shortcomings. I doubt that those who would later commit genocide were ever called. However, remember that Paul, who was headed in that direction, was called.
It was imposed on you?