You ever see a car wreck so inexplicable that you can’t help but slowly brake and stare with your jaw agape? This is the political advertising equivalent of that. The already comically stupid “White Dudes for Harris” — an activist group of white men in support of Democratic presidential candidate Kamala Harris \– lost whatever smidgen of credibility it had left after the group proudly touted its first ad for the vice president on Thursday. You can watch it for yourself below (try not to cringe too hard): Without even mentioning the grating, wannabe-New Yorker narrator, the ad is completely f…