Yes, that book.
I haven’t read wikipedia, but in the introduction, the author wrote that when he used to call these radicals, he said, “I believe politically the opposite things that you do. Would you agree to tell me about the Days of Rage and what you did then?”.
The author’s voice is in the book and it is disapproving.
I thought that maybe someone with some knowledge, who has read the book, can comment. Something like “I was an East Coast cop at the time and this story is true and this is a lie”.
Read Radical Son.
That book matched my very peripheral experience.