If you claim to believe in Superman, it's your burden to prove it. You don't demand that I disprove it.
You are in error. Damocles is correct that no one is required to prove anything. One glance at the cowardly, undereducated leftists on JPP and one can instantly see a complete absence of even willingness to support one's argument. Leftists NEVER support their claims; they simply hurl insults as though that somehow suffices. So one has to wonder where you ever got the nutty idea that religious people somehow answer to you.
If you wish to be correct on this matter, the wording has to be to the effect of the one making an affirmative argument bearing the responsibility to support that argument
if he wishes to convince another rational adult. If gfm7175 for example, tells me that he believes that a man walked on water, and believes that the same man died but came back to life, ... but gfm7175 has no particular need for me to also believe as he does, then he doesn't have to prove anything to anybody. He is free to believe as he wishes and there isn't anything anyone can do about it.
If tomorrow he has a change of heart and he finds that he really needs for me to join his congregation, well then he's going to have to put up with a whole lot of questions from me about the physics-defying parts of his claims ... but the extent to which he supports his arguments is entirely up to him, and I'm in charge of determining if I'm convinced. gfm7175 might try the strategy of opening with the miracle of the wine at Cana, draw me in and get me interested. Then, when I'm starting to like this Jesus guy, gfm7175 can smoothly transition into Salvation and all the loaves and fish I want. The point is that once we understand the context is to convince a third party, the argument can take on the elements of a sales pitch just as it can take the form of a rational argument. No "proving" is required, and this applies both to any Christian who is asserting a belief in the Christian God, and to any non-believer who is asserting a lack of belief in the Christian God. If the desire is to convince, then the burden must be assumed. If I try to convince gfm7175 that he should abandon his belief in the Christian God, then yes, I would bear the full burden to sell the idea of an eternity as worm food, and he would not somehow be required to assume the atheist position as a "default" and somehow have to justify his faith. The burden of support is ultimately borne by the one attempting to convince another rational adult of some affirmative argument.
@gfm7175, I've been meaning to talk to you about eternity, and how you can make an eternal biogeochemical contribution wherever you wish, and your estate might even get a tax credit if solar panels are involved.