Nobody here has tried to vindicate other religions
Stating that other religions worship the same God as we do in Christianity in effect vindicates them as other paths to that same God.
however, many folks, myself included, have expressed the sentiments that it is both incredulous and even pretentious for anyone to assume that any person, group, or faith has power to control or limit the power of the Almighty God. If God wants to talk to Muslims and atheist alike, are y'all going to stop Him?
I think I just said in my previous reply that God calls whom He wills. Again, it is not about limits on God (as there aren't any), but limits that other religions place on their adherents' ability to embrace the true God, e.g., in Islam their god is all powerful BUT does not beget. We know that's nonsense.
Again though, my question has yet to be addressed, if only within the Church can folks worship God, how do folks outside the Church ever convert? Who invites them in if not the Holy Spirit, and if the Holy Spirit invites even them that are outside to come in by God's Grace, how can we then say that God only acts inside the Church hence limiting the Almighty God as if we controlled access to Him instead of Him controlling our access.
Again, this was actually just addressed in my previous reply. Just because those outside of Christianity don't worship God doesn't mean that God doesn't call them to worship Him. But in Islam they reject Him in favor of their own recension, in Judaism they reject Him and still await their political/military messiah, etc. When they stop rejecting Him (and leave Islam, Judaism, etc. for Christianity), then we can talk about them as worshiping the true God.
I think its safer for us simply to promote the Truth of Christianity without having to resort to political style attack ads against folks outside the Church, surely God speaks well enough for Himself, that is, unless folks honestly think He doesn't talk to anyone but themselves
"Political-style attack ads"? You are such a ham...