@froomkin Investigative media should look more widely -- this may be part of a much bigger, organized terrorist threat.
-- Multiple coffee shops in Michigan shut down after receiving threatening letters;
https://www.wxyz.com/news/extremely-disturbing-coffee-shops-in-detroit-lansing-close-after-receiving-threats
-- A coffee shop in northern Kentucky received an inert grenade in its mailbox.
https://www.cincinnati.com/story/news/crime/2023/03/04/fort-mitchell-police-investigating-bomb-threat/69971571007/
The Michigan shops are LGBTQ+ friendly; not known if the Kentucky shop is likewise inclusive.