As I just told Nimos, I do not think it could be proven that there would not be any atheists under that set of conditions, so it is just a personal opinion that there would not be any atheists.
Yes, it can be proven. Any atheists remaining would would violate at least one of your premises.
It seems as if there would not be very many atheists under those conditions, but there might still be some atheists.
If there are any atheists at all, then either:
- God didn't have the power to convince them that he exists, or
- God didn't know how to convince them, or
- God doesn't want to convince them.
The caveat is free will, as people can choose to disbelieve something even if it has been proven to them by God Himself.
This violates your premises.
You said that God "would know how to get everyone to believe in him." The implication of what you're saying now is that he doesn't actually know how to do this.
Here is the dictionary definition of free will:
free will
1
: voluntary choice or decision I do this of my own
free will
2
: freedom of humans to make choices that are not determined by prior causes or by divine intervention
Definition of FREEWILL
Here is my own definition of free will:
Humans have the will/ability to make choices based upon their desires and preferences. Our desires and preferences come from a combination of factors such as
childhood upbringing, heredity, education, adult experiences, and present life circumstances. How
free they are varies with the situation. Certainly what we refer to as “free will” has many constraints. However, we have the ability to make choices. Otherwise, we would just be at the mercy of our past experiences and our heredity.
Right... so how is any of this relevant?
You say that free will is "the will/ability to make choices based upon their desires and preferences." Well, if God decides what those "desires and preferences" are, then God can control what you do, regardless of you being free to choose between the desires that God has given you.
IOW, free will as you've described it wouldn't stop God from being able to choose any outcome he wants.
And if it did stop him, you'd be violating your own premises again: you said that "God wants everyone to believe in him." If God doesn't want everyone to believe in him because it would violate their free will, then the premise that God wants everyone to believe in him would be false.