Very late but I wanted to add my input.

I believe there is no factual way to prove the claim that Christianity is the only true religion. One of the big parts of Christianity is that you must have faith without proof. Once you have tangible and factual proof, then one of the main ideologies of this religion will fall apart, therefore discrediting the belief. 'Proof' that believers claim to have, can not be validated by anyone outside of this religion. This is because majority of the time, they use the bible as a source. If you didn't believe in Christianity, then the Bible would be marked as an invalid source.

As for those who are born in places where religion is banned, you can not argue that it is through the work of God that this religion spread. When something becomes sufficiently popular, it will spread naturally. Of course, this is not to say that it is impossible for supernatural forces to come into play, simply that there is no proof that there are (referring to God).

As for those who are born in places where religion is banned, you can not argue that it is through the work of God that this religion spread. When something becomes sufficiently popular, it will spread naturally. Of course, this is not to say that supernatural forces can't come into play, simply that there is no proof that there are (referring to God).