Ideologically vetting can mean a lot of things. Like, a sign on the door that says "NO TERFS" is a form of ideological vetting.

By this logic any right wing message board would be designated terrorists the moment one person who has posted there commits a violent act.

This is meant to chill domestic left-wing activism. Just like the person who got 30 years for delivering some zines (https://freedom.press/issues/texas-man-sentenced-to-30-years... https://portside.org/2026-06-25/injustice-how-leftist-zines-...)