Do with this what you must:

The paradox of tolerance was described by Karl Popper in 1945. The paradox states that if a society is tolerant without limit, its ability to be tolerant will eventually be seized or destroyed by the intolerant. Popper came to the seemingly paradoxical conclusion that in order to maintain a tolerant society, the society must be intolerant of intolerance.
—Source: wikipedia.org/wiki/Paradox_of_tolerance

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