Thanks to everyone who submitted guesses about the origin of this text:
bjk who spends time over at the Bella Books forum selected the right keywords and came up with the answer. She was even able to give me the page number it was taken from. Well played, bjk!
The text is from The Terrorist Next Door: The Militia Movement and the Radical Right by Daniel Levitas. While the first part of the title is a little sensationalistic, the book is a serious history of the origins of the militia movement.
I’ll be sending her a signed copy of Miles to Go in February.