The ACLU defends the rights of every bellybutton out there with no regard to whether they are popular or not.
Doing what's easy is cake, doing what's HARD is what's notable. The ACLU often does the hard stuff, including defending the rights of Nazi's. If they DON'T defend those rights, then you'll lose 'em If you don't like it, you can geeeeeeet ouuuut.