Because the tools are somewhat comparable, you seem to have been tricked into conflating "protectionism" (which has some stabilising virtues, especially in the area of agriculture, arms, heavy industries, resources extraction) and "dumping" (which is an aggressive act). There is also something to be said about the scale of it. And of the validity of a world view where "every trick is allowed, everything is for grabs, and let the biggest be the winner, and the winner take it all".