1. "Jesus is perfect" - irrelevant. Jesus was human, and therefore imperfect. "Eloi, eloi, lama sabachtami?" This is not the statement of a perfect being, but one in very human pain.
2. A valid objection - a religion is defined by how it is practiced. The record for Christianity is not good (nor is it for Islam, Judaism, ...) The answer here should be behavior, not words.
3. For many, it IS a crutch - or better said, a substitute for real spirituality, in which personal miracles are possible. The answer here is - one cannot be TRULY self-dependent without having some clue about the immaterial aspects of existence.
4. This is true. It IS narrow-minded to attempt to pigeonhole the unpigeonholable.
5. Again, true, and it's the main message of Jesus - do unto others etc. love your neighbor etc.
6. Again, true. A Christian is one who believes in the divine spark in humans, and the worth that it conveys. A good Christian need never have heard of Jesus - but when he does, he will not be surprised.
7. The Bible is largely fantasy and history. The important parts that actually have a message of hope can be reduced to excerpts from the Gospels. Revelation is a maniacally insane hallucination. Parts of Ezekiel as well. Parts of the OT Mosaic law are barbaric. Christianity is behavior, not reading.
8. There is no answer to this question. Read Job, and accept that our primitive state prevents the understanding of some things.
9. See 8.
10. This is a natural and correct question that, if properly answered, removes the Zoroastrian and Mithraic coloring of the real Christian message.
One can answer all these objections with the single statement - Christianity is that behavior which treats humans with respect because, like Jesus, they all personally take part of the divine.