Al Fadi and Dr jay Smith  discuss more doctrinal differences between Christianity and Islam and today they start with the trinity; they point out how the Christian God is relational both in the God head and with His creation.  They point out that we are made in God's image to be relational too.  Second they show the difference between Christians who are children of God versus Muslims who are slaves of Allah. Children can call God Daddy, and communicate with God without fear; Muslims are afraid of their God and must submit to him as master.