There is no doubt that the sage and saint Rabbi S. R. Hirsch, of blessed memory ... did a great thing in founding the admirable and outstanding Religionsgesellschaft which became an exemplary Jewish community. Had the God-fearing not separated themselves by means of a separate kehillah, due to their minority status they would have become submerged within the general community [a development] which did not occur when they separated and developed on their own. Then even the general community was forced to improve itself and to conduct the general institutions in a sacred manner.
Ahi'ezer. Kovetz lggeros 1:243 Rabbi Hayyim Ozer Grodzinski in Judith Bleich, “Rabbinic Responses to Nonobservance in the Modern Era,” In J. J. Schacter (Ed.), Jewish tradition and the nontraditional Jew (pp. 37-115), Northvale, NJ: Jason Aronson Inc. (1992), p. 89