Ken Minogue ‘s Pure Theory of Ideology includes this quote from Marx:

[Criticism] is a weapon. Its object is its enemy, which it wants not to refute to exterminates …. Criticism appears no longer as an end in itself, but only as a means. its essential sentiment is indignation, its essential activity is denunciation

https://newcriterion.com/issues/2021/6/ideologists-amok