Hypothetically, science proves free will isn't real

[Drich]

Why would we do that? the bible tells us we are slaves to sin with no will of our own..

You are confusing church doctrine (based off a greek philosphy) with what the bible actually says.

I'm not talking about the bible at all.

So Christianity (that which is based on the bible) is not a Religion?

 I'm talking about the idea that people aren't responsible for their actions, and how most religions that I'm aware of are based on the idea people are responsible for their actions.

Again according to what we learned from the likes of Jesus and Paul we are all slaves to sin. Meaning we are not responsible for our actions/We may not be the source of desire, origin for our acts, but yet we are still held to account for them Unless we have obtained the atonement in which Christ offers.