> But Trump has been bedfellows with white supremacists since day one.
Yes, but there were people who thought that once he became president his true nature would come out and things would be better and that he was merely using these people as a tool to get elected. Now, he probably did use them as a tool to get elected but at the same time I suspect that his real sympathies lie with them rather than with the groups that would like to consider everybody equal before the law.
> All of a sudden there are "optical disadvantages" of being closer to him?
Well, there probably always were disadvantages but they are becoming rather more pronounced now. People are calling for boycotts of the products of companies standing with Trump and every action that Trump takes that forces them to either go all in or denounce him will cause a few to break off. It's surprising me that so many companies are still on board.