It is that. The Sacramento Kings announcer got fired for saying "All lives matter."
But I think it's even more than that. That cop should fry for what he did to Floyd, no doubt. It was a truly horrific act. But we're dangerously close to mob rule. It's almost to the point of, "Give us what we want or we'll burn your city down." Forget due process, constitutional lawmaking, and the rule of law. Give in to us or you are finished. And for the most part people are giving in to it.
That is a very bad precedent to set and is no way for a city, state, or country to run itself.