Why do people hold a grudge on muslims?

Sometimes, people do bad things, and right now, its terrorrist. Just because they are muslims, doesn't mean that you have to hate all muslims. I am Muslim, and i hate terrorist. During World War 2, Adolf Hitler killed millions of Jews, the Jews only hated the Germans, not all of Christianity. Islam means Peace. Our religion is based on Peace and Education. Not slaughtering People. In my opinion, Christians are more aggresive. Such as Adolf Hitler. And durung the Crusades, whenMuslims had The holy land, they let all religions practice what they want, but christians, only let christians and slaughters muslims