Presumably these religious government fans base their opinion on the inerrancy of the Bible. As a totally non-religious person, it seems to me that it should be fairly easy to disprove the literal truth of the New Testament.
For instance the Gospel of John states more than once that if you ask for something in Jesus’ name it will be granted. Now, assuming God wants everyone to be a Christian, I would invite believers to pray that I see their beliefs are true, become a believer and confess my faith on the spot.

I haven’t actually had occasion to try that on anyone as my philosophy is not to annoy those who aren’t annoying me and no one has tried to proselytize me in decades, but I think it avoids the “God won’t grant your wish for a million dollars because its not part of his plan” responses that one generally sees.