Many people believe sincerely in false things, but that does not change the truthfulness of what they believe. The object of faith, the content, is what determines whether a religion is true or false, not the sincerity of its adherents.
Many people believe sincerely in false things, but that does not change the truthfulness of what they believe. The object of faith, the content, is what determines whether a religion is true or false, not the sincerity of its adherents.