That's all well and good, but you said/implied you dislike MJ's music. Now you're talking about this hammer --> face -type of music, which should be unrelated

That's all well and good, but you said/implied you dislike MJ's music. Now you're talking about this hammer --> face -type of music, which should be unrelated to the issue at hand - 'light pop'. Were you, in fact, not talking about 'light pop' when you said "I strongly dislike this type of music"? If so, it would seem that you were participating in some other conversation, which would be really weird.