Hate Speech is not protected free speech any more than falsely yelling 'fire' in a crowded venue is protected.

"U.S. laws aren’t keeping up with spread of hate online, says civil rights advocate" PBS NewsHour 4/9/2019

Excerpt

SUMMARY:  Violent hate crimes are on the rise in the U.S. and across the globe.  As a result, the ways in which hate groups use social media to threaten, galvanize and radicalize are drawing new scrutiny, including from Congress on Tuesday.  Amna Nawaz reports on the Capitol Hill discussion and talks to Kristen Clarke of the Lawyers’ Committee for Civil Rights Under Law, a national civil rights organization.