"Condemned to be free." How very Christian, in some ways. Free will means one is responsible for one's actions. One can't claim determinism as an excuse for the needle or the liquor store robbery. Sartre didn't like depth psychology, rejected the notion of the psyche as largely unconscious--which is my mind is a ridiculous move, because where are our memories when we aren't remembering them? Or are memories not part of the psyche?
Even if we aren't
free, and I'm no determinist, we still need a culture that encourages the taking of blame, the taking of personal responsibility. At the same time, it seems childish to utterly ignore how determined we are statistically (a tricky thing) by education, exposure to positive role models. I say again that we live with a split attitude on this matter. We believe in free will when it suits us, and in determinism when it suits us. And this does have its advantages, as the question is a difficult one. What is
causality for Christ's sake? So often, I see causality taken as a given, as if it were not a strange concept. This shows the dominance of the naturalistic worldview, which I generally embrace, except where it crowds out philosophical investigation.
Nietzsche railed against the priest for using Free Will as a means to blame, accuse, etc. But then Nietzsche wasn't exactly a determinist either. He about as easy to pin down as a fart on certain matters. It seems that Einstein was a determinist and that this made him forgiving. I suspect it was the same with Spinoza. If all is one, then there's no sense in objecting to this or that aspect, as all aspects of the one (Nature/God) are equally justified and necessary.
The existentialist often strike me as iconoclastic Christians. If the individual living human is "everything", this is an echo of the incarnation myth. We see the same rebellion against anonymous systematization. K didn't want to be swallowed by Hegel's abstractions, right? It's a tricky game to make abstractions about the superiority of the concrete to the abstract. But perhaps I misinterpret.