Does every country in the world maliciously connive to keep their currency low vs the dollar? Currency valuations are not tariffs and it is absurd to compare them to a tariff.
These tariffs are a huge mistake according to almost every mainstream economist, I hope instead of parroting the party line you’ll be able to admit their failure in a few years.
Vietnam does manipulate its currency. It’s not something that hasn’t been widely discussed for the past decade or more.
And if you artificially keep your exchange rate 10% higher, that’s an effective 10% tariff on US imports.
I have no idea if the tariffs will work but I don’t fault a country for saying “we’re matching the tariffs you apply to our exports”