Is There Such a Thing as Historical Christianity?

I have alluded to the fact that some of the things I have been learning have led me to question whether there is a real beginning to Christianity. This is what many in the scholarly world seek to prove.

In fact, it seems that even the roots of Christianity, the Jewish tradition, is also of various opinions and theories. This leaves little room for rational faith. And this is the point of the radical. Radicalism is the 'leap" where reason leaves off. But, what if one is not willing to trust the dark as "God's hand"? Does that person "die in their sins"?

I find it hard to believe or think that any God worth serving is "bound to anyone's service" , "duty", or understanding. Service must come from the person's desire to do "good" and their voluntary giving of themselves in their personal value system and not from any outside source or authorial demand. This is why I wonder and question about people of radical faith.

As faith has been based on many things, what is truly "real faith"? Faith in a rationale for life is no less faith. Why does anyone suppose that faith has to look "the same" or believe the same things about life in this world, as faith is living out one's life based upon one's understanding of life. Everyone has faith, just not in the type of 'god" you might suppose, by faith.