When Rav Elazar Shach gave a speech in 1990, lambasting secular israelis, calling them breeders of pigs and rabbits, (which later became known as the famous “rabbits and pigs speech”) the Lubavitcher Rebbe came out, calling for rav shach to apologize and saying that its not the way to be mekarev yidden.
You left out the part about the secular man who later told Rav Shach that he took it to heart and did teshuvah.