"Freedom of speech" is used as shorthand for both the general culture of open listening to disagreeable views, and for a series of laws related to the first amendment.
98% of the time people are talking about the former, and the only ones confused are the people assuming they're talking about the latter and linking the face-palm-worthy "showing them the door" XKCD.
98% of the time people are talking about the former, and the only ones confused are the people assuming they're talking about the latter and linking the face-palm-worthy "showing them the door" XKCD.