You have a bad case of believing the history you were brought up with. You called Hamas a designated terrorist organization. Just because the US designated them doesn't mean they're terrorists. Most people in the world consider them Liberation soldiers. Same with September 11th 2001. Many people around the world feel those attacks were Justified and many others know that the US and Israeli governments were involved in the attacks. It's been said that a lie repeated often enough becomes the truth it's also true that a lie repeated for long enough becomes history. And that's what you're talking about teaching.