I have no idea why this occurs (the remorse thing), but the experience is not uncommon and I experienced exactly the same thing.
When I first came to this place I became certain that I was going to hell and deathly afraid. I began to freak out and started essentially to panic.
But this was not rational panic, as far as I could recall I had not done anything morally reprehensible, in such a way that it would be a blockage for me, and furthermore I didn't just feel bad, I WAS bad.
This is what Richard talks about, you are bad to your core. And there is no changing this, the parasitic nature of your existence is in fact painful.
It seems extremely difficult to go extinct, but it can be done, one must first be sincere.
"But how James? How, how, how? Everything I do seems insincere, I am bad to the bone, I am a liar, and a fake."
Exactly, you are false.
But the point is the little bastard (as McKenna calls it) who tells you what to do, the burning desire to be real is in fact your pure intent.
And that is the way, extinction.