I was learning to play an instrument online and then found out the teacher practices occultism. Am I being foolish in not wanting to learn from him anymore despite his ability to teach? Does learning something like music from a teacher with corrupt views affect me spiritually? Thank you.
Without getting into the topic if it is or isn’t idolatry, from a technical halachic angle, it is permitted to learn from him, however practically, learning from a teacher that has corrupt views is not a good idea. Not because his views automatically corrupt you spiritually, rather because he can slip his life-views into the lesson, and subtly feed you his corrupt way of thinking. I don’t mean to say that you are not allowed to learn from him, but I understand your concern.