That's not the point - the idea of Free Speech is to protect people from having their voices silenced simply on the grounds that it offends or bothers another person/group. The WBC is the essence of hate and bigotry, but their right to be hateful bigots is the greatest thing about America and Free Speech.
Their rhetoric is not protected by the constitution!
Nah, my family's smart enough to avoid being this idiotic.
How is your family going to avoid having a funeral?Are you all going to be cremated?