1. A theist's position is reasonable because of the faith of the people who believe in it as witnesses themselves of God being real. However, it is said also in the bible: "Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Therefore by their fruits you will know them." If you really havent found a person of indisputably good moral character and understanding, the reasons God is real and Jesus is God are the following: For God: If you do not doubt the scriptures, which is the main argument against God's existance (to doubt them, for any reason) It is evident that God is real. You may call this argument a historic argument. For Jesus: The moral character argumebt applies to him, of which those who knew him knew he was without flaw.// If you do not believe him, you may believe his miracles// This is said by Jesus, (I placed it in bars /). The miracles of his disciples shortly after his death and resurrection also are proof. Historic argument again.
2. I dont know.
3. I dont know.

I myself am not ready to say I am of undisputably good moral character, so ask someone else.