What's exactly your problem? If his understanding of morality differs from the common person's it would naturally follow that he wouldn't want his children associated with that.
If you wanted to argue the cost vs. benefit of private school, or other alternatives to public schools, go ahead.
I have no problem with private school, just his attitude that private school is just so amazing and wholesome. Dude probably drives by a public school every morning and says a prayer for all those poor souls getting a crappy faith-less education. The horror!
+1 and I would like to add an eye roll to people who think that private schools are infinitely better education than public thus guaranteeing better odds for their kids. I went to literally one of the smallest and lowest funded public schools in my state (which I'll admit the curriculum was a bit of a joke) but I got directly admitted into my program at college that most people have to apply after a year or two of general ed classes because of my high grades and SAT scores. I graduated in 3.5 years (most people take 5 when they don't get directly admitted) while working full time to support myself and now have a M.S. in accounting and have not relied on my parents for anything since i was 18.
I know so many people that went to my high school that swear their kids will never go there because it's such a crappy school (including a few that plan on homeschooling even though they barely graduated....) but never made anything of themselves. From my experience it is so much more on the parents to raise successful and well rounded kids than on the high school they are sent to
now that the thread is totally derailed ... I'm not sure I follow your last paragraph. You say the parents are the biggest player in a successful child, but you look down at homeschooling? If they did truly barely graduate (from HS?) they ought not home-school through HS, but it's probably fine for elementary.
Also, the original comment wasn't about the education. It was about the faith and morals of private vs. public school. Especially for certain religions, I don't see why that's a problem to want someone who is an expert on that religion to educate your children on that religion day-in and day-out. Though again, I'm not sure it's worth paying tons of money for when you could do it yourself, if that's your thing.