Yes, the American Civil Liberties Union has historically defended the free speech rights of neo-Nazis, most notably by representing a neo-Nazi group that sought to march in Skokie, Illinois, in 1978. The ACLU's position is based on the principle that free speech rights must apply to everyone, including those with odious views, to prevent the government from suppressing any dissenting message. This principle ensures that the right to protest is protected for all, not just for those whose views are popular or politically palatable.