Would a justification for "god" allow you to believe in "god"? Is that your goal? You mentioned earlier religions getting a convert... *poof!* I hope you know it doesn't really work that way.
Justification for "god" won't rid your world of the lack of justification for "god." Both necessarily exist (as part of "the creation").
What do you mean by "both necessarily exist?" I am listening, but even though you profess objectivism I get deeply confused by many of your statements that reek of subjectivism. You'll say yes I agree there is one reality then make statements like "Both necessarily exist," where "both" is mutually exclusive and contradictory.
"Both" can't necessarily exist if they are contradictory statements in objective reality! Either there
is justification for gods or there is
not justification for gods, sort of like being pregnant or not. It's dichotomous.
If there
is justification for theism then atheism is untenable (given warrant)
If there
isn't justification for theism then theism is untenable (given warrant)
So yes, it would be "poof" just like that because given a valid justification that provides warrant for theism I would be forced to admit that theism is rational.