This is a common approach by groups who perpetuate hate speech- to exclaim with faux outrage that any limits on hate speech are tantamount to the dissolution of free speech at the behest of ostensibly powerful minority groups. I won't go so far as to accuse you of being a member of hate groups, but your response certainly echoes the propaganda that they spread, especially in forums like HN.
The fact is that society has always drawn lines about what speech and behavior is and isn't acceptable in different venues and circumstances. Facebook's choice to censor hate speech is no different from a bar, restaurant, or department store asking someone to leave for shouting the N-word at fellow shoppers. It's a private non-governmental entity making a choice about how they want their users to act on their platform.
Furthermore, free speech claims in favor of hate speech ignore the real material costs in human lives that facilitating hate speech incurs. While I greatly value free speech personally, I also greatly