It is perhaps reasonable to argue that super-rich film stars and other high profile people are possibly doing more harm than good in making political pronouncements. On the other hand, it seems to me that even when "ordinary" people protest and demonstrate there are some who feel they have no right to do so.
I think there are also some very slanted statements in the article. There is a very big difference between the - admittedly stereotypical and disrespectful - naming of the Washington Redskins and the attitudes, motivation and actions of the Ku Klux Klan, which supports Trump. To equate the two is, I think, misleading and manipulative.
An "opinion piece" on BBC 2 this evening expressed the same feeling that too much fuss was being made about Trump. It is noticeable that most of the people who are very relaxed about Trump's statements on race are people who are not affected by them.
I agree that the above ground pool "joke" suggests a most unpleasant strain of snobbery and superiority. But to suggest that this is the attitude of most "liberals" is, I think, ridiculous. I'm pretty sure there are plenty of right wingers and Trump supporters who are pretty unsympathetic and scornful about the lives of less well off people. I don't think Trump himself has in the past shown much respect for his workers or been a great champion of their rights.