The bible disagrees with this belief.  God in Genesis shows them as having the same purpose and so does Jesus Christ in the Gospels which is why he commands that all believers treat all others the same as they want to be treated not different in purpose.  This is the greatest commandment per Jesus Christ and the commandment that we will be judged upon most if we fail to keep it or not.  Jesus even tells us that we cannot claim to genuinely love God if we do not love one another and we can't love one another if we treat others differently or less than we wish to be treated.