D&D General Fanatics & Zealots: How to Use Extremism in Antagonists and Villains in Your Campaigns (+)

[Krachek]

Extremist group are often full of internal conflict, search for power or be the one true leader,
there should be obvious flaws to exploit when dealing against them.

 

[JThursby]

Very comprehensive and well written. I would just like to add that anyone interested in this topic should read the original Dune novels if they want to read fiction that is primarily concerned with extremism and the people/circumstances that cause it.