I wasn't too upset at them for leaving the 2A to other groups. There are plenty of people who would donate to support the rest of the bill of rights who might have issues with guns, and the ACLU getting their money to defend the 1st, 4th, and 5th amendments was great.

The problem came when they started letting modern progressive politics override their commitment to basic civil liberties. They didn't need to get involved in the gay wedding cakes thing, for example.