The star of the Food Network show Ginormous Food, which seeks out the biggest and tastiest foods in America, may have bitten off more than he can chew. The caustic standup comedian stirred up a hornets nest of comments on Twitter with some insulting remarks that took aim at Muslims, blacks, Jews, and others in a series of random riffs and off-the-wall comments. Denny veered between bits that seemed to be taken from a gonzo stand-up comedy routine designed to outrage and…