What everyone has to be prepared to accept is that these are organised racists, deliberately targeting the highest profile black footballer in the league to send their message of hate to all the black footballers, under the cover of it just being part of the game.
We saw it happen before, it should be pretty easy just to call them out on it and stop giving Nazis the benefit of the doubt.
When you engage in the argument on the rights and wrongs of booing, they get more people joining in, who are just going along with some sort of anti establishment vibe, which provides cover to the Nazis.