Let us interrogate the religionists in this fashion, say the deists.

Chinese, what religion would be the best, if your own were not the best?
Naturalism.

Mussulmans, what faith would you embrace, if you abjured Mahomet?
Naturalism.

Christians, what is the true religion, if it be not Christianity?
Judaism.

But you, O Jews, what is the true religion, if Judaism be false?
Naturalism.