Uh no, no he isn't. He literally called the phrase itself stupid, he didn't say anything about it losing its meaning. No.

On the one hand he's saying it's idiotic then in the same hand he's using the same phrase he's calling stupid as a title for his book.

Have you done any research whatsoever on why he named the book that, or do you just blindly agree with people around you? He is trying to reclaim the phrase from the Left, while it's also a play on words, "right" having two meanings in political context

Just laugh at the funny tweet and move on

Isnt that the problem though, that most people just laugh and keep scrolling, with no idea if there was actually any reason in in they just read? Have you done any research at all on why Ben named his book that? Didnt think so. Again, I dont like the guy but thats irrelevant here