Whats worrying is not only the fact that the parents neglected these children in favor of their own childish behaviors (drinking, sex, etc) it's troubling to know that these parents are instilling attitudes of hatred and violence towards ethnic and racial groups other than their own. If these children had remained in the home, not only would they have been subject to more violence and neglect, but the attitude of hate would have been instilled into them to the point that it would have taken years of therapy and behavior modification to rehabilitate them. These children might have grown up to commit violent crimes. We need to do all we can as a society to ensure that these attitudes are not handed down generation to generation which eventually becomes breeding grounds for terrorism. Yes I said terrorism because that's what Hitler instilled in the children of Hitler's Germany, that's what the Ku Klux Klan does, that's what the New Black Panthers do. They instill attitudes of hate into children who are extremely impressionable. This is why we have so many terrorists over in the middle east. They are taught from a very young age that Westerners, not just Americans, deserve to be dead. Not all, but some terrorist groups pick boys from very young ages to come to their 'schools' where they are taught hate, and they are taught to fight, all in the name of Allah. Not every Muslim believes this, but the younger they are exposed to this sort of attitude, the more likely they are to take part in the violence later in life.
Its not a crime to teach your children your personal beliefs and hand it down to them, but it is a crime to teach your children that it's OK to kill and maim people of racial groups other than your own. That's why Manitoba Provincial Police stepped in. They saw the potential for violence from these children later in life.