For the millions raised as leftists, it is not an ideology; it is a culture. Since childhood, they have lived and breathed it every day in the home. They know nothing else. Like any culture, it is a way of speaking, thinking and acting, with its own narratives and rituals. Narratives are held sacred, repeated, reinforced and, over time, added to. That which challenges sacred narratives, even reality itself, is met with confusion and hostility. As with any aggressive, intolerant culture, if you enter it, it enters you.