Fun fact: here in Germany, home schooling is illegal. I'm with you -- I think this is probably for the best. After all, how do you get kids to learn to socialize and integrate with society at large (regardless of their background), if they don't attend school and get out from under their parents?
But this is also the only basis on which Germans can typically sucessfully claim asylum in the US, and have successfully in the past: the idea that they are fleeing "religious or political persecution" for not being allowed to keep their kids at home and teach them in an isolated environment.