I suppose that I used the word "ignorance" in a broad sense to include those fanatics who are smart enough to understand how to disrupt a world, but NOT smart enough to realize that this makes things worse for everybody.

Selfishness, religious madness and ruthless lack of concern for a broader humanity is ignorance in my book. Hope that clarifies.

I guess that I would add ignorance today after reading about the SF Zoo's poor measurements on the Tiger cage!