Express your opinion on the morality of violence against a Nazi and differentiate between it and the use of satire or freedom of speech to criticize a certain group without promoting hate or discrimination.
It may not be legal, but it is ALWAYS ok to punch a Nazi in the face.
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I might not do so, but I also would not intervene to stop it.
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To the best of my knowledge Hebdo cartoons did not advocate for the removal of Muslims from France.  Big difference