Supremasite
A supremacist parasite. Someone who thinks that their culture, values or perspectives are the best, but take it a step further and want to control or abuse others of a different culture, or with different values or perspectives in a way other than just healthy discussion and debate.
I always knew Cindy was opinionated, but I didn't realize she was such a supremasite until she made the PTA cancel the field trip to the science museum just because the kids might learn about evolution! Just because she doesn't want her children learning about it, doesn't mean no one's kids should!