The Atlantic’s Anne Applebaum on Friday warned American voters that former President Donald Trump has crossed a line that even racist demagogues such as George Wallace never did. In particular, Applebaum shines a spotlight on the purportedly dehumanizing rhetoric that Trump has been deploying on the campaign trail, such as referring to his political opponents as “the enemy within” and as “vermin,” which is the exact kind of rhetoric used by some of the greatest mass murderers of the 20th Century, including Josef Stalin, Adolf Hitler, and Pol Pot. Even though Wallace infamously called to mainta…