Adorno on signing appeals

Another quote from Grand Hotel Abyss: The Lives of the Frankfurt School, this time from Theodore Adorno:

It is difficult to even sign appeals with which one sympathises, because in their inevitable desire to have a political impact, they always contain an element of untruth … The absence of commitment is not necessarily a moral defect; it can also be moral because it means insisting on the autonomy of one’s own point of view.