If somebody is spewing national socialist dogma, they are free to think and say those things but everybody else is also free to judge them as anti-liberty. Libertarians should be careful about supporting national socialists since we will let them speak but they will not let us speak if they assume power. They don't believe in freedom of speech.
Another person's 'freedom of speech' ends in my view the moment they support censoring the speech of others. If you want to claim the right for yourself, you must recognize it for others.
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