Is Ideologie just a foreign word/scientific term for Weltanschauung? Where do you see nuances in meaning? Would you use Weltanschauung in an academic discussion? What is the correct context?
For example, would you say leftism is a ideology, atheism a weltanschauung/world view? What is a simple criterion to differ both? The number of people sharing this view? A Weltanschauung can become a Ideologie but not the other way round? A Ideologie needs a stronger & more exact accordance in content by many people? Here are some examples listed for Ideologie/World view, to test your criterions...