CTL, I did not write that there were absolutely none. There were a handful but it was a drop in the bucket. The fact of the matter is that while at the time of the Great Immigration the vast majority of East European Jews were observant for the vast majority Shabbat observance went out the window already in the first generation for economic reasons. There were even vatikin minyanim on Shabbat for people who went to work! The second generation through out most of the rest but remained culturally Jewish because of the spread of discrimination. This was answered by Jewish fraternities and sororities, Jewish neighborhoods and Jewish business firms (also new merit-based civil service rules made some public offices Jewish-dominated). The third and generation did not keep anything but still generally married within the group Now that is also out. This has been compared to the four sons. The chacham is the immigrant, the rasha is his son who wanted to be American and throw off “foreign ways”, the simple is his son who does not know very much except for what little he heard from his grandfather, the son who does not know how to ask is his son who is totally ignorant Jewish and now there is a fifth son who is not even present.
Joseph, actually “Torah uMadda” is an extension “Torah im Derech Eretz”. In fact, the Hildesheimer Rabbinic Academy in Berlin required the equivalent of an academic HS diploma and students also studied in the university. Amongthem were Rav Soloveichik and the last Lubavitcher rebbe (who woirked as an electrical engineer in the Bklyn navy Yard before becoming the rebbe).