I try not to watch much TV, but back about 20 years ago, going through a divorce/child custody battle, I couldn't help but notice how common both shows and ads were that portrayed men as complete idiots. Of course, nearly all the charactors on TV were white, hence white men being the dummies.
Now-a-days, one of the ads that always gets to me are the ones for some sort of burglar alarm / monitering system. All the perps who break in, attempt to break in, etc. are all white.
We ( white men ) are simply a "safe" target to insult.
Mark