Anyone with sincere religious beliefs cannot say that all religions are true. That is so illogical it is pathetic. All religion cannot be true because some of them are so diametrically opposed to each other.

McDowell argues against religious pluralism understood as the claim that all religions are equally true in the same sense. His point is a logical one: major religions make mutually exclusive truth-claims (for example, about the nature of God, the identity of Jesus, salvation, or ultimate reality). If two claims contradict each other, they cannot both be true simultaneously in the same respect. The quote reflects a common apologetic strategy in evangelical Christian writing: shifting the discussion from sincerity or moral value to propositional coherence, and insisting that genuine commitment to a religion entails taking its truth-claims seriously rather than flattening differences into a vague “all paths” sentiment.