Change instances.
There are, unfortunately, a number of Mastodon administrators who have decided that any criticism of Zionism is anti-Semitism.
My full response to the IHRA definition of anti-Semitism is here: https://www.disunitedstates.org/p/for-the-record-my-analysis-of-the
#mastoadmin who have embraced that definition should read it and adjust their behavior accordingly.