I don't agree at all. You asked the question why there are so many divisions in Christianity, and then raised the question why so many different beliefs about various topics. My answer to you directly responds to these questions. You are displaying one of the reasons for lack of agreement, a turning away from Scriptural Christianity. Your liberal brand of Christianity forces Christians to separate from your liberal beliefs, because they don't correspond with historic, doctrinally-orthodox Christianity.
As such, my response, that your view is liberal and heretical, is completely on-topic. It is one of the major reasons there are divisions in Christianity, particularly between conservative groups and liberal groups within Christianity.
Of course, liberals will claim they have an inside scoop on what the Scriptures really mean. But this doesn't jibe with how historic Christianity views it. You may not like my answer, but it is, in fact, on topic!