Why do people get so pissed when you edit a musician to a song that isn't theirs?

I don't know why this is even a problem to people tbh. You'll see an Ozzy edit with, lets take Dragula by Rob Zombie as audio, for example. The entire comment section will be pissed off over the song choice. Why?? Is this like a unspoken rule to only use the artists music whenever making a post about them? Have I just been living under rock to not know about this orrr... Such a non issue. I'm generally confused on how this hate even came up. Whatever. I think it's useless to hate on people for reasons like this. People get annoyed over everything on the internet.