No it's not it's easily rectified with swift rulings in the favor of parents who notice the schools doing this.
Can't happen when it's illegal for parents to question curriculum.
I was speaking to daily involvement in the child's life and their involvement in the house of worship of their choosing.
When I grew up, my parents knew all the subjects my brothers and I were taking and part of the dinner table discussions were always on what my three brothers and I learned that day. That's parental involvement.
And it is not illegal for parents to question cirricula. That's defeatist propaganda.