The state is allowing the teacher to teach something, instead of enforcing its own views on him or her.
This is actually one of the few reasons why tenure is a good thing for teachers. It does us no good to fire teachers for saying controversial things. Especially since it looks like the teacher was trying to teach the idea that the term terrorism is a relativist term.
Plan for eliminating the national debt in 10-20 years:
Specific cuts; defense spending: http://rolexian.wordpress.com/2011/01/03/more-detailed-look-a