God healing amputees is equal to God writing in the sky – I EXIST! BELIEVE IN ME!
Incorrect. If amputees spontaneously healed, we would think nothing of it. It's only because they don't, that we use it as proof against a god that heals. It's fairly obvious anyway that god does not heal people.
You misunderstand faith. It should not be so hard to believe in god. The point of Christianity is not to be so obscure that you are always in doubt. The point is to inherit the spirit of Jesus, and be saved by the sterling message in the NT. You should have faith to follow Jesus, and give away all your money, for the end is nigh. But you don't have any faith at all, really, do you?
Your assertion that faith is like so, is tantamount to admitting that you are in doubt about the existence of god, yet you seem to be an apologist for a god that doesn't do anything identifiable, which is against the specifications of the Christian God.