It's short term vs long term thinking and clearly they know way more about the Constitution and law than I do to identify major threats to liberty. It's pretty normal for both lay people and professionals to disagree with that strategy, as there are often disagreements in the law. And while I think having this discussion is important, framing it as an existential crisis for the organization is a bit fatalistic.
It's my opinion, and people are welcome to disagree (that's OK), that much of the angst directed towards the ACLU in this thread is more appropriate and effective if directed at the government bodies suppressing free speech, instead.