Only a very small number of people will go around talking about it all the time and trying to police other people’s use of language.

It's the aggregate effort I'm thinking about. You can't swing a dead cat on Medium without hitting an article on the subject.

In the case of slavery, I think you are swimming upstream, because adding syllables is not how language evolves. That's why I say the effort appears performative. I'm still trying to figure out why Black people, who successfully demanded sixty years ago that "negro" be replaced by "Black," would later demand to be called "African-American." Most Whites don't really want to pay the syllabification tax, and, of course, many children use the term for Black people who aren't American because they think it means "Black," because that's how language works.

Caring is not a binary trait. I care about people. I give money and I volunteer, and I vote for the safety net and the taxes that make it possible. I just don't care in the way you do. Point is, you can't say that people who won't hobble their thinking by the distraction of PC language don't "care." You can only say that they husband their intellectual resources differently from you.