Lynda, I don't think he is going to kiss you for making him look like an A__
so to save face he tried to attack back. If you wanted to provide the proof to show how uninformed he really is I would say you could probably record a 5-10 second piece of a song and then remove the vocals to show it can be done.
As far as the legality, is it really legal to take a song from a copyrighted CD, strip the vocals, add the lyrics and create your own karaoke song without getting a release from the original producer?