That misunderstanding is why echo chambers grow. Your fear of being perceived as a Nazi only reveals that you're overly concerned what other people think of you, which strongly suggests that you're young and naive. As you grow up, you'll stop caring what others think of you (hopefully you will — no everyone does), and you'll learn to respectfully engage in conversation with people of divergent viewpoints (even if they happen to believe their personal level of melanin justifies their superiority complex).