The American Freedom Defense Initiative isn't the poster child for first amendment rights (i.e. Freedom of Speech). They're bigoted opponents of the first amendment (i.e. Freedom of Religion). They may have the legal right to say what they say, but that doesn't obligate the rest of us to support what they really are at heart.
* The Southern Poverty Law Center tracks extremist groups in numerous categories, including black separatists, holocaust deniers, anti-LGBT and anti-immigrant.