Non sequitur. If I am wrong then free will doesn't exist, that's it. We're not even arguing about the existence of God so I have no idea how you can say this. Explain.
If theres free will there can be no entity that has knowledge of future events. If theres an entity that has knowledge of future events there can be no free will.
We ARE assuming things, how else are we even able to discuss this?
Indeed, and assumptions work both ways. If youre asking us to assume that god exists for an argument I can ask you to assume that there is no god to explore a hypothesis.
You'd have to believe having the power to do something is a sufficient reason to do it. Which is a ridiculous position to hold. How many things that you have the power to accomplish do you actually do on a daily basis?
To do what? Just the fact that there is knowledge (in fact just the ability to have that knowledge) would preclude free will. No action needs to be taken.
Past events are fixed and the choices made were free.
But they weren't past events when the choices were made. Thats the fundamental difference between the past and the future.
We have the past, where choices have been made and now things are fixed (you dont get to chose again what you did yesterday).
We have the present, where we make the decisions (but the present is ephemeral)
We have the future, where all possibilities are open because nothing has been chosen yet.