The Silent Brotherhood by Kevin Flynn and Gary Gerhardt is worth reading as well. You might also try (in no particular order)
Extremism in America (Lyman Sargent, editor),
The Beast Awakens by Martin Lee,
Armed and Dangerous by James Coates, James Ridgeway’s
Blood in the Face (there is also a ‘Discovery Channel’ documentary based on this work),
Harvest of Rage by Joel Dyer, Kenneth Stern’s
A Force Upon the Plain,
Hate by William Schmaltz, and even
Warrior Dreams by James William Gibson. Several of the authors bring an apparent 'left-wing' bias to their work, but if you can differentiate between fact and opinion, each of these books is worth reading.
But (more to the point) if you can refrain from referring to people whom you yourself declare are not "bonafide Christians" as members of the "Christian right," your posts would improve somewhat in both accuracy and consistency...