Nah, you say black here. I'm not sure from where/who you get your ideas about the United States, but you should probably stop listening to them immediately since this isn't the first time you've had some misconceptions about how things are here. I omitted it because I agreed with it, and therefore had no response.
Regular booing/jeering from opposing fans is nothing out of the ordinary and is to be considered normal for a sporting event, you are correct. HOWEVER, as for the bold, the chants started before the goal, there are posts about it in the live thread before the goal. Hence their anger during the game, which as we both stated is justified in such a situation.