First off, I absolutely despise any religion or "culture" that deliberately inflicts unnecessary pain and suffering on animals because of their backwater, ignorant retardedly superstitious beliefs. Yes, that means Jews, Muslims, and most east Asian religious followers as well. To be certified Kosher or Halal, the animals must be killed in a certain way, which according to most of their doctrines, is slitting the throat and letting the animal bleed out, but keeping the spinal cord intact. I can only assume that this is due to some sort of innate cruelty from these sadistic, subhuman fucks. Factory farming is bad enough as it is, hence why I try to shop local and homestead as much as possible, but if you're not interested in pleasing the chosenites, you can at least stun the animal first before killing it. And the superstitions of the "chinese medicine" remedies has already been elaborated on in this thread. Needlessly killing endangered species, cutting off shark fins or rhino horns for health or fertility cures or whatever the zips can think up next.
It's hard for me to pin down a true "american" style cuisine that is distinctly its own. Yeah the "Hurr durr burgers dogs fries junk food" rhetoric is basically a meme at this point, but that's just a symptom of the overall greed and corruption of the US food corporations. As others have said, with all of the lobbying and technicalities, shit is sold here that legally wouldn't or couldn't be sold in many other places, especially the EU. And fast food is just a cheap, usually unhealthy and poor bastardization of the real thing anyway. For better or worse, the US is a cultural melting pot, and most of what we would think as "American" food has been co-opted and adapted from other cultures. They were making bratwurst in Bavaria 200 years before Europeans explored the Americas, for example. Creole and barbecue have deep roots in African and Caribbean slave dishes, with European and Native influences. Even traditional "Homestyle" American foods like roasted birds, large game, hearty soups, stews, casseroles, root vegetables and the like, all have heavy European and native influences as well.
I think the worst "cuisine" if it could even be called that, that I've had the unfortunate experience of being around, is whatever the nasty shit that the sub-saharan Nig-nogs like to eat that smells like rancid feet. I seriously don't know what the fuck it is, but I've been to an "authentic" Ethiopian place, and unfortunately dealt with more than my fair share of Somalians while traveling on the west side of Columbus, and that fucking smell permeates those people. Their food, their clothes, their vehicles, it's everywhere. The food that i tried the one time i was forced to go to the Ethiopian place was some weird mush on a sponge, and was fucking vile. It was somehow bland, sour, gritty and spicy all at once. And the shit they put it with had the exact same texture as a magic eraser sponge, but the color of cardboard. 2 bites and I was done.
And I can't fathom how people can tolerate the rotten/fermented fish from the nordic regions. I get that at one time, thats all that those people had to live on, but in the modern post-scarcity world, people who voluntarily seek out rotten fermented fish "preserved" with lye or canned fermented herring with specific instructions to open it under water to avoid the smell... I have no idea what they're thinking.