"Maybe I'll start a hip-hop singaround for white middle aged men. Now that would be a truly horrendous thing."

Why would that be horrendous? Would it be more horrendous than white middle-aged men singing a blues song? There's always someone who will tell you you can't do this or that because of your age, your sex, your skin color, where you come from, your looks, etc. It's not that long ago that African-Americans had no possibility of studying music and becoming opera singers or conductors or composers and I think it's still not easy. The story goes someone once asked Thomas "Fats" Waller why he hadn't become a concert pianist and he answered "Because I'm black".

I don't happen to like rap but maybe there are some white middle-aged men or women or elderly Ohioans or slightly long-in-the-tooth people from Missouri who are great at it and have just been overlooked because they don't belong to a "cool" demographic.

I don't think dumping on white middle aged people is any better than dumping on anyone else, even if it's a white middle-aged person doing it. Haven't we learned anything?