The book is not about traditional Catholics.
It is about schismatics and sedevacantists.
You continue to blur the difference.
Hey, I could tell you what the difference actually is.
Written in a popular and accessible style, More Catholic Than the Pope provides a detailed analysis of and response to common arguments raised by extreme traditionalist Catholics (in particular, adherents of the Society of St. Pius X) against the Second Vatican Council, Pope John Paul II, the fact that the late Archbishop Marcel Lefebvre committed a schismatic act by illicitly ordaining four bishops in 1988, and more. Chapters include a history of the SSPX, a background on the controversy between the SSPX and the so-called "Conciliar Church," and answers to several standard canon-law and historical arguments often raised by extreme traditionalists.
We'll see how he defines "extreme traditionalist." I have a feeling it's going to be more than those you name.