The ironically named ADF claims it's a free speech issue. How do you suppose they would feel if I sent my kid to school wearing a shirt that said, "All White People are Guilty of Genocide" with an indian head silhouette?
I would never make that assumption. After all, in their minds, it's perfectly all right for their religion to impose their views on everyone else. But, if I try to use my religion to impose my views on them, that's evil.