Question: Which philosophy is this?

If everybody is doomed to hell because of the choices they make to sin, and the reason they make those choices to sin is because sin is inescapable and everywhere and they can't get away from it even though TECHNICALLY there is a choice not to sin and go to heaven its just really really hard to make ......

What philosophy would I be talking about or could I talk about in relation to this?

I was thinking maybe existentialism because it's sort of like the actions you take is what is making your fate kind of thing but then I thought maybe nihilism because at the same time I'm saying 'okay theres a 99% chance you're going to hell, because its impossible to carry out the choice not to' but I'm not saying life is meaningless or anything.

So I don't know