Ignoring actual disagreement about what the 2nd amendment means and what policy should be, why would the ACLU invest in 2nd amendment rights in a world where there is already a a strong lobby dedicated to them.
SAF and GOA have done more than NRA in the past 10 years anyhow. The only people sad about NRA dissolving are the people internally doing it.
But apparently trying to hide a fact might make it change!