Religious pluralists often claim that religious beliefs are culturally relative: the religion you adopt is determined by where you live, not the rationality/truth of the religion itself. If you live in India you will probably be a Hindu; if you live in the U.S. you will probably be a Christian. One’s personal religious beliefs are nothing more than a geographic accident, so we should not believe that our religion is true while others are not.
This argument is a double-edged sword. If the religious pluralist had been born in Saudi Arabia he would have been a Muslim, and Muslims are religious particularists! His pluralistic view of religion is dependent on his being born in 20th century Western society!
A more pointed critique of this argument, however, comes from the realm of logic. The line of reasoning employed by the pluralist commits the genetic fallacy (invalidating a view based on how a person came to hold that view). The fact of the matter is that the truth of a belief is independent of the influences that brought you to believe in it. While the observation that one’s religious beliefs are often determined by where they live is valid from an empirical standpoint, what follows from that observation? Nothing. While I may be a Christian because I live in a society in which most people are Christians, it does not mean that my Christian beliefs are not true. The truth of Christianity depends on the veracity of the claims themselves, nothing more and nothing less.