The signatories have generally continued to complain about censoriousness from the left even while the right wing is detaining people for their speech, insisting that media personalities be fired for their speech, insisting that people (including naturalized citizens) be deported for their speech, cancelling grants because they are too "woke", and straight up passing laws banning the teaching of certain topics in secondary and postsecondary school.
Weiss herself is a participant with UATX, a expressly right wing university that has fired people for not being sufficiently critical of DEI efforts.
Weiss also has a long history of efforts to stifle the public debate that the signatories claim to support. The first thing that got her notoriety was an effort to get various professors at Columbia fired for their speech.