Creed dependent on circumstances

[HectorVG]

In a conversation with an agnostic / atheist, one of the arguments to discredit the effectiveness of Christianity in particular is to make the following proclamation:

"You are a Christian because you were born in a Christian society, a place where Christianity is highly acceptable, but if you were born where Islam is highly acceptable, it would be Muslim, it all depends on where you grow up, then you will adopt that creed"

How would you respond to this?

[Relativist]

The guy raises a good general point, but you can claim that a belief in Christianity can be rationally justified: present Craig's historical argument for the Resurrection. Chances are, the guy won't figure out what's wrong with that argument- so you will win.

[jayceeii]

...it all depends on where you grow up, then you will adopt that creed.

The argument is correct. This is cultural influence on the transmigrating soul. If all souls have an equal start, even without accepting transmigration, this case is proved when countries maintain a majority of one religious belief or another. Clearly this is tradition from the parents influencing the children! God may be in better control of the planet than people think. Instead of proving weak, revealing only one true religion and allowing the others to arise as if helpless to prevent them by power or argument, God may have given them all to a cantankerous race, requiring opposition to thrive. The trenches between the religions remain firm. Each has internal consistency, beyond the power of man to supply.