Whether Jesus was a man, an exaggerated man, or a imaginary character...there's no reason to assassinate his character...ie. calling him a liar...whatever he was according to what we know the character he presents is better than the character we present...i agree with alex the wise.
the problem is not with Jesus the man, or Jesus the character...the problem derives from what came after Jesus.
So...more to the point...instead of assassinating his character by saying he lied...the truth is that if anyone lied it was the people that came after him.
Let's take an example...
Alex was a good man, a decent man, an honest man
after Alex died people started telling rumors about Alex, bad rumors, like Alex hated blacks and wore pink undies
is this Alex's fault?
Sorry, but I don't think we should assassinate the character of great men...even if we ' suspect ' they have been exaggerated or fictionalized, there have been so few of them throughout history.