There are plenty of supporters of Trump out there, even in Hollywood and the NFL, but most are afraid to openly say it. Johnny Rotten has the courage that they lack. A handful of celebrities have also voiced support for Trump, including actor James Woods.
I get suspect that political writer, Libertarian, and humorist P.J. O'Rourke punked out by supporting Hillary in 2016 and Biden in 2020, because he's afraid of the consequences of not opposing Trump, which would negatively affect his career.
Yes, we now live in a country with institutions that will not allow freedom to express support for the President of the United States, unless he or she is a Democrat.