Bringing close those of Jewish ancestry is considered a meritorious act according to all of the poskim who hold by the inyan of zers yisrael- R’ Benzion Uziel is probably the most famous of these, but also R’ Tzvi Hirsch Kalischer (the Drishas Tzion), Rav Hayyim Druckman, Rav Hayyim Amsalem, and even the Radbaz all believed that zera yisrael should be brought close.
And, what is wrong with Rabbi Avi Weiss? He has more ahavat yisrael in his pinky finger than any of us will ever have, and he has brought thousands to frumkeit.