It's false triggering. They pretend to be outraged by it, causing others to storm in and tell them off. It's a technique to get your thread replies and attention and keep it going.
Everybody on 4chan knows the deal, Japanese culture has always and will always be tolerated on every board. They just like to see all the (you)'s
Sushi is a meme food. Ramen is somewhat but it's also actually tasty. It's not surprising that there should be a backlash against sushi and also other meme foods like pho.
Seriously, fuck sushi and pho. I hope there's a fusion Japanese-Vietnamese trend one day that completely destroys all the demand for these god awful dishes
>high end sushi in US same as cheapest sushi in japan
Weeb that's never been to Japan detected. Grocery store sushi in japan is only ~slightly~ better than grocery store sushi in the US.