You are a Muslim. What if your children in Canadian schools were put through mandatory Christianity classes and Bible classes and taught those things are the truth and fact but not taught anything about Islam or Quran. Would you be okay with that?
Children are very impressionable and have plastic brains. Whatever you teach them whether its Hinduism, Christianity, Islam, they will most probably believe in it until they die.
This is what Pakistan govt has been doing to Kalash people. They are using their children to systematically eradicate their culture, language, religion, identity and history.