The comments he’s replying to suggest that racism is the answer, but the poster who made this joke has more relevant information than those who assume racism immediately: OP is white as fuck. Since OP is white as fuck, and the comments were suggesting that due to racism those horrid whites just want to “other” the “other white guy” by pointing out that his “skin color is different,” but seeing as they’re both white, the “skin color difference” is implied to come from going outside and getting a tan. And thus the crux of the joke, Newfoundland gets less sun so the people there are more pale than say, white people in Miami.