This thread and the scenario (which I'm about to present) is all hypothetical, so don't get your knickers in a knot.
Suppose circumstances have changed where there are now proofs that the Abrahamic God do exist (hypothetically, of course). This would make the positions of atheists, and to some extents, of agnostics, obsolete or invalid positions to take.
Then the choice and questions become (the following) for non-religious folks -
Do you or would you worship this god?
Why or why not?
And for theist or religious folks -
Would you (religious folks) force those who don't worship god to worship, with crusade-like or inquisition-like or jihad-like wrath?