Well, actually, for Christianity you have the situation of God showing Himself, telling them us what we need to know AND
going to BOTH heaven and hell and coming back. You have other people since then doing somewhat similar with the dying
and going to heaven or hell part, but not the same.
However, many people at the time, seeing all this, choose to deny it as well, so its not like thats really a valid
demand since it obviously doesn't win everyone over. And most like to go through life now saying "well, I
wasn't there, why doesn't he do it again for ME, since Hes so great and I'm so great too that I deserve a
personal demonstration, rather than just hearing about it."
With the whole idea though that you SHOULDN'T see to believe, as I believe was indicated above, I'd also point
to the Apostles and Disciples, many of whom believed specifically BECAUSE they did see. Would just like to point out
that you CAN have faith from seeing as well, although it is possibly preferable in some manners to do so without having
seen, but that does not mean without reason either, necessarily.
On another note: In Islam, isn't it believed that Muhammad Resurrect too for a short while? I'm not entirely
familiar, its been years since I studied that.
As for other religions: Can't say much on the topic, my knowledge of most others indicates a lack of even a
similarly believed situation.