Meriam - You have a large, powerful, high defence drive dog that can very close mauling a human. Think about this:
Denial - The psychological process by which human beings protect themselves from things which threaten them by blocking knowledge of those things from their awareness. It is a defense which distorts reality; it keeps us from feeling the pain and uncomfortable truth about things we do not want to face. If we cannot feel or see the consequences of our actions, then everything is fine and we can continue to live without making any changes.
You have a very real problem, be honest with yourself before someone is seriously hurt. You won't want to spend the rest of you life this a mauling or death of a human on your conscience.