WHY ARE THERE SO MANY DENOMINATIONS?

Answer:
In the early 1500s, a German Catholic monk named Martin Luther was so conscious of his sins that he spent up to six hours in the confessional. Through study of the Scriptures he found that salvation didn’t come through anything he did, but simply through trusting in the finished work of the cross of Jesus Christ. He listed the contradictions between what the Scriptures said and what his church taught, and nailed his “95 Theses” to the church door in Wittenberg, Germany.
Martin Luther became the first to “protest” against the Roman church, and thus he became the father of the Protestant church. Since that split, there have been many disagreements about how much water one should baptize with, how to sing what and why, who should govern who, etc., causing thousands of splinter groups. Many of these groups are convinced that they alone are right. These have become known as Protestant “denominations.” Despite the confusion, these churches subscribe to certain foundational beliefs such as the deity, death, burial, and resurrection of Jesus Christ. The Bible says, “The foundation of God stands sure, having this seal, The Lord knows them that are his” (2 Timothy 2:19).
Thomas Jefferson once wrote of a preacher, Richard Mote, who “exclaimed aloud to his congregation that he did not believe there was a Quaker, Presbyterian, Methodist, or Baptist in heaven, having paused to give his hearers time to stare and to wonder. He adds that, in Heaven, God knew no distinctions.”

FOR MORE INFORMATION:
http://www.gotquestions.org/denominations-Christian.html