the chad meme is outdated and was supposed to represent white purity when vikings are in fact one of the more mixed race europeans. they derived much of their genetic material from the eurasian steppes. the notion that they were blond and blue eyed probably came from scandanavian commoners projecting their own traits on to them as the vikings were the “chad” who were attracting the ladies of that time. ironically scandanavians tend to have the most eurasian steppe dna among all the other major european ethnic groups.
using chad as part of an anime meme actually brings “chad” closer to his asian roots.