From ["Mormonism," The Uses of Diversity; Illustrated London News, May 13, 1911]:
We talk much about "respecting" this or that person's religion; but the way to respect a religion is to treat it as a religion: to ask what are its tenets and what are their consequences. But modern tolerance is deafer than intolerance. The old religious authorities, at least, defined a heresy before they condemned it, and read a book before they burned it. But we are always saying to a Mormon or a Moslem - "Never mind about your religion, come to my arms." To which he naturally replies -- "But I do mind about my religion, and I advise you to mind your eye."
Thanks to the American Chesterton Society for that quote.