I've been trying to connect this dot for a couple of days now. Rabbi had an interest in the "Soviet Jewry" movement. Just like
Pennsylvania Attorney General Josh Shapiro's Mom
This is a solid lead.
By the way, there's an Ava Shapiro that works for Bend the Arc in Brooklyn NY which is the same group that didn't want POTUS to visit Pittsburgh. I'm not sure if she's related to Josh. So many Shapiros out there.