Why would countries retaliate against a sales tax on Americans?

Power plants fueling desalination. There is alot of material about it. It’s part of the treaties with America. But to refine to weapon grade uranium is not a technological enhancement, you simply run the same enrichment procedure multiple times is my understanding. The main difference is the tricky detonation, but come on, that’s decades old tech.

The treaties were made with the understanding they could make nukes if they wanted to.