They sure did, but they've changed. They helped obtain permits for the "Unite the Right" rally in Charlottesville, which devolved into a MAGA riot that ended with a white supremacist murdering one protestor and injuring 35 others. Since then the ACLU has become far more squeamish about their clients and has been willing to compromise on their historical principles.
https://www.theatlantic.com/ideas/archive/2022/05/aclu-johnn...
I think the ACLU is still a good organization, but it's no longer the ACLU. It should be monomaniacal and universally despised.