I would expand that to any ideology, where the difference between an idea and an ideology around the idea, is whether that one idea (as good as it might be!) gets treated with sanctity over other ideas.

I.e. Anacapitalists who love capitalism so much they think it can solve virtually all of societies decision making scenarios better than alternatives, such as democratic government, justice systems, etc.

I came across a poet from a Soviet controlled country who referred to ideologists as "lunatics with a good idea". I have tried repeatedly to identify the poet since but have not been able to.