How then shall we teach tolerance without discussing what we are being tolerant of?
Sure, we can model tolerant behavior.
Sure, we can use catch-phrases that accentuate differences.
Sure, we can celebrate uniqueness in culture and customs.
But we aren't doing anything specific there. Not that I have a problem with that, but it is not the same as replying to my comment "homosexual studies do not belong in school" with "we need to teach tolerance."
I know a nice guy that is gay. I don't want to be his friend, yup, because he represents a lifestyle I find reprehensible. I am polite, helpful, and have even defended him against those that publicly bashed him for being gay. Still, he is not my friend and never will be. I could live next door to him, I could work next to him, and as long as he never mentions his lifestyle, we could talk. But that's it.
I can show him respect, but I will never approve of his lifestyle, nor will I ever be a part of spreading it. How tolerant is that?