More Shabbos guests sounds like a great idea, Syag!
But I meant ‘how do we go ahead?’ on a communal, organizational level.
Git M brings up an interesting point.
It’s well known that in pre-war Europe many communities suffered from their own ‘off-the-derech’ crisis, losing their young people to the Communists, the Neologs (their version of Conservative), Hashomer Hatzair and other irreligious Zionist movements, and the lure of the Goldene Medina where Shabbos observance sadly fell by the wayside for many.
I’m not aware of any communal, institutionalized attempts to be mekarev those who left Torah and Mitzvos behind. Perhaps on a personal level families tried to remain in contact with their relatives. For many, the response of choice was cutting off communication and staying as far away, and keeping their children as far away, as possible.
The great accomplishments of the major Kiruv organizations can’t be denied. Every Neshama they’ve brought back to living a life of Torah is a monumental achievement. But I’m definitely curious to see if someone offers Git Mesh an answer to his question.