I am open-minded in the way that I don't care if a person is black, white, christian, jewish, wiccan, straight, gay, mainstream conformist, anarchist, metal-head, or whatever. I hate all people equally.
However, I am certain there are topics in which I'm closed minded. No one is 100% open-minded with everything, however the difference is people with intelligance and character have the ability to open up their minds when they need to. When they realize that they are closed-minded and blatantly wrong. That's what separates general closed-mindedness from ignorant stupidity.