Indeed. It has been said that an understanding of tariffs is the one thing that practically all economists, who are notorious for disagreements on other matters, agree upon. In fact, those who peddle protectionist nonsense these days tend to be one of three things:
(1) agenda-driven organizations with an interest in protection, such as labor unions and industries that stand to gain
(2) ignorant individuals who have been conned into accepting the arguments put for by the members of group (1) for exactly that purpose
(3) ignorant individuals who stare head on at all the evidence in the world showing the fallacy of protectionism yet refuse to budge out of their own stubbornness or unwillingness to admit personal fallability.
It never ceases to amaze me how many idiots can be stacked one atop the other in "the blue zone."