The ACLU defends YOUR rights too
This is also one that puzzles me. I think it is primarily that some people dislike some of the causes that the ACLU has taken up (e.g. against ridiculous religious wackos trying to instill their brand of religion or morality as the law of the land) and so they discard the whole organization out of pocket. But their slogan, “Freedom can’t defend itself” speaks to exactly what they are here for: to defend The Bill of Rights. You know, the Bill of Rights is what gives the religious people their freedom to practice religion. Too bad they don’t see that the ACLU is also fighting for their rights too.