It's insane to believe that any more than a minuscule fraction of Nike's target market agree with Derec's opinions about Kaepernick.
Even in the unlikely event that Derec's assessment was 100% correct in every way, Nike wouldn't give a shit. They are appealing to their target market, and everyone else is irrelevant at worst, and helpful to their cause at best - Nothing galvanises young people to join a fad, trend, or fashion quite as effectively as having old people ranting about how awful it is.
It's possible that Nike don't give a shit what Derec thinks; But it's more plausible that they actively welcome his vocal opposition to their marketing strategy.
These are smart people, and they are focused on selling the brand. Politics is just a tool to them; They don't care one whit about it other than as a means to the end of greater sales.