The tweets and Facebook posts are from Otto Penzler's The Mysterious Bookshop's 40th Anniversary Party.* The event happened on April 23, 2019.
The text is from a letter written by Otto Penzler to the Mystery Writers of America's Board of Directors. It is from December 2018.†
Four months. Only four months.
". . . racially charged and utterly misinformed letters from Attica Locke and Steph Cha." - Otto Penzler
"Her [Cha] stupefying ignorance did not, however, prevent her from having powerful opinions. " - Otto Penzler
", , , a tweet sent by Locke, in which she claimed that Ms. Fairstein was “almost single-handedly responsible for the wrongful incarceration of the Central Park Five,” which is neither true nor credible to anyone with even a fundamental understanding of police procedure and the legal system." - Otto Penzler
"For many years, I have welcomed the celebration of the incoming board with a party at the Mysterious Bookshop. The board does not deserve a celebration of any kind, and it would be hypocritical of me to host one. You are no longer welcome in my bookshop." - Otto Penzler
* Let's not kid anyone, that was an Edgar Party too.
† You can read the pdf version.