Was looking for examples of the ACLU defending people whose views the ACLU disagrees with. Took some digging but found this example
When the government discloses associational information to the general public, it increases the risk that supporters of unpopular groups will be subjected to threats, harassment, and reprisals. Because the risk of chilling associational freedoms is especially acute under these circumstances, public-disclosure requirements are subject to more stringent judicial scrutiny than...