I know this thread invites the anti-theists to take their petty pot-shots at God, but they are a constant, so we will ignore them.
*Christianity is twice the size if its nearest rival. Over a billion people More!
*Christianity seems to have the most effective message of all religions. It has been successful in virtually every culture on Earth. How many Swedish Hindus are there? How many Buddhist Ugandans? How many Paraguayan Muslims?
*Christianity has been so successful, many countries have laws that attempt to restrict and impede it.
*Is it not reasonable to expect the most true religion to be the most universally acceptable? Why would a message from God be hindered by ethnicity or culture?
*Can adoption by a western king account for Christianity's worldwide success?
*Why has no other religion been able to duplicate Christianity's performance for 2,000 years?
Since the atheist does not believe Christianity is true, how does he account for its unmatched performance in the world? In terms of effective performance, no religion comes even close to matching Christianity's record. What, if not because it is true, in your opinion explains this?