> Do you think Rav henkin approved of his son sending his grandson to a mixed college?
Do you know he did not? And here we have 1 not 2-generational problems. And presumably Rav educated his son himself or at least sent him to the right yeshiva. What caused the son to change his views? Same w/ Rav Feinstein and his daughter. Is this the sign of those times? In our days, most Rabbinical families do not have a lot of children going OTD. Here you are talking about gedolim en masse not being able to educate their children. An alternative explanation would be that those children’s behavior is within the norms acceptable to their parents but you can’t fathom this.