Homeschooling by radical Christians

I've just read about book speaking about homeschooling in which these passages were:

[Father Gary:] “I’m not a wise man in the world’s things. I’m not even academically able to teach a lot of subjects and neither is my wife. We resolved in ourselves years and years ago that if we were able to teach our children character, teach them how to read so that they could read the Bible, we would have done all that is necessary for them to survive this world. And we’re not going to put ourselves up under other people’s ideas of what an educated person is. So we’ve taught each one of them that we would be just as proud to see them hanging off a garbage truck, knowing that they don’t lie, steal, cheat, and despise God.” (p. 72)
…
Gary has returned to the kitchen by this point and has been listening to his daughter describe their schoolwork. “We started homeschooling back before it became popular,” he recounts. “Our eldest daughters are twenty-five years old now and they never went to a public school for a day.” He pulls out a chair from the kitchen table and settles himself in it. “The public schools are being assaulted by Satan,” he continues. “In the public schools, we’d be worried about our daughters being raped, assaulted, learning Satan worship, fighting, all the guns, the deaths in the schools, knifings. Teachers molesting children. Homosexuals, you know, demanding their wickedness be crammed into the classroom.”
[Daughter] Sharon shakes her head in disapproval. “The only reason that I would want to go to the public school,” she says, “would be for the socialization. That’s the only reason.”
“But you have that at church,” Gary points out.
Sharon agrees. “We have that anywhere else.”
“And you have that going to Wal-Mart,” Gary adds. (p. 75)

Now tell me, how in the world can exist such moron. There's nothing bad about homeschooling, even if any of parents is not educated for teaching(maybe). But are these serious? Bible as the universal surviving manual? 'Guess they've upgraded Bible from what it was, when I read it last time. I don't remember there were math, physics, history(i mean REAL history, not fairy tales) in Bible. And we wonder then, how many stupid people are out there. Now you know the reason. Like father, like son i guess. It's really not the son's fault, though.

I personaly think there is a need for examining parents that want to homeschool their children. It's not for the sake of society's goodness. These people live in minority. It's for the sake of those children. They should have the right to learn other things as well, not only the Bible and parents shouldn't be the ones to take that right from them. This right is in Children's rights charter after all.

Fortunately the trend goes the other way. Lunatic families like this are slowly disapearing. I personaly don't have any business with families such as this, they don't affect me after all, but I just can't watch children growing up in such circumstances.