There is no absolute, objective way to judge if some policy is a good or bad. We can only determine if some policy achieves its goals. This is difficult as different justifications for the tariffs have been given.

We can also have philosophical arguments over whether the goals are good in some abstract sense. For example, some people on the right feel that the US not having access to X-mas knick-knacks and gifts is positive, as it will force people to engage with religion.