Itchesrulik: BH your father accomplished but how many did not remain frum or their frumkiet did not last more then a generation. It is also impossible to compare the public school enviroment today to those of the time your father went.Even in younger grades today everything is allowed everything taught and everything permitted and remember the kids have access to everything in their homes, are these the homes you would feel comfortable sending your kids to play by?
I will agree with you though I am sure your father is very ehrlich as are his friends.But, that has nothing to do with public school. It has to do with the kochos that went into him, and the appreciation by many grandparents after the holocaust to have a strong Jewish identity instilled in their children.