I am afraid you are confusing him with Guy Benson, who has written several negative op-eds about President Trump
The last thing (and probably biggest thing) that makes some righties hate Ben Shapiro is that Shapiro has been very critical of Trump. If you go on The_Donald, Shapiro is villified right up there with Michelle Wolf and Nancy Pelosi. Shapiro made it clear during the 2016 elections that he wanted someone else and has continuously criticized Trump ...