How can this site claim to want free speech but it is clearly stated in the TOS Posting content of any kind that incites discrimination, hate or violence towards one person or a group of people because of their belonging to a race, religion or nation is s

As you can see, it is a part of the TOS of the hoster, so the site could risk to get pulled (like Voat did when Host Europe pulled their hosting for TOS violations, like the oldfags among us may remember).