I believe the Satmars and Chabad both did this with Neturei Karta.
Obviously, this is a 'not-to-be-taken-seriously' proposal from a typically over the top media/policy personality. But the overt declarations of ostracism he includes probably will play out somewhat in the real world, at least socially, in terms of shul and holidays.
Which creates lots of problems. The more isolated and ostracized the #Jewish community makes them, the less the connection they'll have to the Jewish community and the weirder shit will get over time. We create pariahs at our own risk.
And even as I say that, I couldn't possibly see myself chatting over kiddush or hosting them at my seder. 🤷♂️
