I think it is supposed to be an insult about being white, since in many countries, white people eat less spicy food and are more sensitive to it. They think we are all white.

Well, I certainly qualify as Pretty Damn White (entirely of Northern European ancestry from what I can tell)... and am an onion/spices devotee. Since forever. Also adore garlic. Standard American food is WAY too bland for me. All that salt-- where's the cracked black pepper??? And paprika and coriander and everything??? One of my fave recipes uses ALL the Indian spices in the spice rack (plus onion, garlic, jalapeno pepper, and lemon juice). Grated ginger root is a mainstay at my house.

This seems to be a wokester preoccupation of late: saw something similar at Pajiba (lefty pop-culture site) before all their fanatical trans-evangelism drove me off for good. "These are the foods that WHITE PEOPLE [boo, hiss] eat!" (I'd never touched most of 'em in my life.) "So they're BAD! Ever had Rum Raisin Ice Cream, or mayonnaise, or cream of wheat? REPENT, SINNER!!!" ["Um, but I'm black, and I like Rum Raisin Ice Cream...?" "Oh, uh, well, that's fine of course! Duh! But otherwise TOTALLY INEXCUSABLE OMG YOU MUST BE A NAZI!!!"] "And obviously nothing here that's SPICY, white people recoil from THAT like vampires from a crucifix, only sexy exotic people with lots of MELANIN can handle hot stuff!"

The irony is, my tastes probably have something to DO with being white... specifically, German-American (in part): grew up, if not on that cuisine proper, on food heavily-influenced by its enthusiastic use of cracked black pepper, spices in general, garlic... and onions. Quite a departure from British-style cooking. But then, that's true of so much "white people" food: Italian, Spanish, French, etc...