No True Scotsman Fallacy originated by atheist Antony Flew who shortly before his death admitted to the existence of God. A well documented fact.
Flew’s argument:
Imagine Hamish McDonald, a Scotsman, sitting down with his Glasgow Morning Herald and seeing an article about how the “Brighton Sex Maniac Strikes Again.” Hamish is shocked and declares that “No Scotsman would do such a thing.” The next day he sits down to read his Glasgow Morning Herald again and this time finds an article about an Aberdeen man whose brutal actions make the Brighton sex maniac seem almost gentlemanly. This fact shows that Hamish was wrong in his opinion but is he going to admit this? Not likely. This time he says, “No true Scotsman would do such a thing.”
—Antony Flew, Thinking About Thinking (1975)
I answer that:
That the fallacy exists in some contexts must be allowed. Some true Scotsmen certainly could be capable of heinous crimes, because the definition of a true Scotsman does not require that one be incapable of such acts. To be a true Scotsman one need only be a citizen of Scotland with the proper birth certificate.
It is interesting that this fallacy should have been discovered by an atheist and applied so often by atheists to discredit the Christian claim that no true Christian, while waving the Christian banner, would engage in savage acts of wanton cruelty, destruction, and murder. Hitler is an example. Baptized a Catholic (though he was no longer Catholic during his dictatorship) some atheists will insist that his religion was at the root of his monstrous acts. In other words, as Catholics we cannot avoid Hitler’s scandalizing the Church by saying that no true Catholic could be so evil. According to Flew, this would be equivalent to saying no true Scotsman could be so evil, which is clearly illogical.
But Flew has grossly oversimplified the application of this fallacy. Whereas anyone can define a true Scotsman as one who has citizenship papers, the atheist does not get to define who is a Christian as opposed to who is not. It is Christ alone who can define a true Christian, and here is his definition:
"Beware of false prophets, who come to you in sheep’s clothing, but underneath are ravenous wolves. By their fruits you will know them…. A good tree cannot bear bad fruit, nor can a rotten tree bear good fruit…. Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father in heaven. Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name? Did we not drive out demons in your name? Did we not do mighty deeds in your name?’ Then I will declare to them solemnly, ‘I never knew you. Depart from me, you evildoers.’” Matthew 7:15-23 “I never knew you” must certainly mean, at the very least, “You are not a true Christian.”
Jacques Maritain echoed Christ’s definition of a true Christian in his book The Range of Reason. “There are practical atheists who believe that they believe in God (and who perhaps believe in Him in their brains) but who in reality deny His existence by each one of their deeds. Out of the living God they have made an idol.” Following Maritain’s logic, we may allow a far greater number of atheists in the world than we ever imagined.
The leaders of the Crusades, the Inquisition, and the Wars of the Reformation were practical atheists. Christ did not preach crusades, or torture on the rack, or religious wars. Those who did preach such things were not true Christians. There is plenty of evidence that the real aim of these crimes was the lust for power, gold, and other men’s property. These perpetrators, who dared to speak for Christ and waved his banner, were “wolves among the sheep,” and Christ “never knew them.” But that is not to say they were not very well known by their inner demons.