So maybe there was no Jesus- or maybe there was- what does it matter?
The way I see it, (as an agnostic and practically faithless), any better understanding of how and why religious beliefs and myths develop can give us insight into the human psyche. Hopefully we can use that knowledge, not simply to destroy religious institutions, (although I wouldn't be upset to see a certain Brooklyn based group disappear), but to address the fears, hopes etc of most people in the here and now in a way that fits with our current world. Maybe there'd be a little more peace in this world. Then there's just the part of me that's obsessed with "origins".