I'm not a lawyer or an "expert," but I am pretty sure that, as a news source, you can't just make up a quote from someone, whole cloth, in order to defame and slander them.
That's what the radical pro-LGBT website The Daily Kos has done to Matt Walsh.
Yes, that's legitimately the headline.
A 100% lie about Matt Walsh simply because they HATE him.
They explicitly imply that Matt Walsh wished that more people were killed in Colorado.
(You know, because he's an evil conservative.)
The second tweet here is Matt linking to Daily Wire's legal counsel demanding an immediate retraction and apology for the libelous headline.