They interpret 2A as a collective right for the purposes of explaining why they (and note that this specifically refers to the national ACLU organization!) do not step in to defend it.
However, they never argue in court against 2A. Nor do they prohibit their member state organizations from taking a different position - and many do.
Yes, ACLU is a broad "civil liberties" organization. But there's no definitive list of civil liberties, and different people have different opinions on this. The fact that SCOTUS ruled on it doesn't change matters - SCOTUS rules on whether something is a constitutional right or not, not on whether something is a civil right or not. The latter is inherently a subjective assessment.
However, they never argue in court against 2A. Nor do they prohibit their member state organizations from taking a different position - and many do.
Yes, ACLU is a broad "civil liberties" organization. But there's no definitive list of civil liberties, and different people have different opinions on this. The fact that SCOTUS ruled on it doesn't change matters - SCOTUS rules on whether something is a constitutional right or not, not on whether something is a civil right or not. The latter is inherently a subjective assessment.