[lakhim]

Its not a fallacy but game theory playing out - known as beggar thy neighbour policies.

https://en.wikipedia.org/wiki/Beggar_thy_neighbour

[nonethewiser]

That is very relevant overall and I thank you for bringing it to my attention. But what I'm talking about are people who declare tariffs as an absolute bad and then go on to say enacting them is rational and good. In the beggar thy neighbor policy, the behavior is not considered an absolutely bad thing. This happens with tariffs as well, but people can be even more dogmatic about it.

[lakhim]

Think of it like an invasion - shooting people is probably as close to an absolute bad thing as you can get, but if you're getting shot at its pretty much time to start shooting back