Nothing could be further from the truth. Christianity, vibrant christianity, is relevant, open to the possibilities of an omnipotent God, humble. Jesus' life is better documented and studied than the life of the great William Shakespeare. If you think these are arrogant, presumptuous statements, please remember two things. Not everyone who names the name of Jesus Christ is actually living out christianity.
Christians make mistakes and outright blunders too.
Few of us claim perfection. And, don't dismiss the thought of arrogance as a knee-jerk reaction. There is a great deal of press and manipulated public opinion that could drive that kind of reaction. Think it through for yourself carefully and over some time. Yes, sadly that is true.