Either liberalism must extend the freedoms of those who are not themselves liberals and even to those whose deliberate purpose is to destroy the liberal society -- in effect, that is, must grant a free hand to its assassins; or liberalism must deny its own principles, restrict the freedoms, and practice discrimination. It is as if the rules of football provided no penalties against those who violated the rules.
Suicide of the West: An Essay on the Meaning and Destiny of Liberalism, James Burnham
1964