Religious belief tracks geography, not truth.
The objection, in full
Had you been born in Riyadh, you'd defend Islam with the same conviction you now defend Christianity. Lhasa, Buddhism. Ancient Athens, the Olympians. The overwhelming predictor of someone's "saving faith" is the latitude and longitude of their crib. A truth this important shouldn't depend on a postal code.
If we have a knock-down argument that the others can't have, it's strange that almost no one finds it except by accident of birth.
or, in plain terms —If I'd been born in Pakistan, I'd be a Muslim. So how is my faith "true"?
The seeds of the Word were everywhere.
I was a Platonist before I was a Christian, and I do not repent of having read Plato. Whatever was said rightly by any thinker — Greek, barbarian, before Christ or after — belongs to us Christians. For the Word who became flesh in Jesus is the same Word who scattered seeds of truth throughout the human race from the beginning.
When Socrates spoke of justice, when the Stoics spoke of the Logos, when the Hindu sage groped toward Brahman — they were not all simply wrong. They were partial. They held fragments of the truth that came whole in Christ.
So the question is not "why was I born where I was?" but "what fragments did my tradition hold, and where do they point?" Every honest religion, examined closely, points beyond itself.