I support homeschoolers like you. I know several kids who are homeschooled under similar philosophies, and they're the smartest people I've ever met. They take AP and college classes early, sometimes even as young teens, and are encouraged to do independent reading and think for themselves.
The article in question, though, is about parents who kept their children out of school over religious objections to the curriculum. That, I oppose vehemently.
Then you should oppose Germany's law, because it would take my kid away too. It makes no distinction. It doesn't set an educational standard -- it simply demands obedience.
Then Germany's law is bad and needs revision to set an educational standard instead of demanding obedience. Parents still don't have a right to isolate their children from information they don't like.
Personally I think, in the US, Yoder v. Wisconsin (holding the Amish had a right to see to education in line with their religion) was one of the greatest decisions of the Supreme Court, right up there with Brown v. Board. In doing so, the court affirmed that the Amish religious way of life is deserving of protection and the state may not use the education system to destroy that, even if that means that children raised in such households will have fewer career opportunities.
Our country is pluralistic. That means that we must afford those we disagree with a right to exist as cultural groups. Religion is a deep part of culture and it is closely tied to a way of life.
The article in question, though, is about parents who kept their children out of school over religious objections to the curriculum. That, I oppose vehemently.