To say Trump's tariff to the Brazil caused by economic reason is a complete non sense. In fact, US recorded surplus trade against Brazil. I think the main reasons are two, the first is BRICS, and the second is Bolsonaro.
However, Brazil taxed everything. They taxed foreign tech so high like almost 100%, which is so crazy.
So in this case, it is reasonable that US will do the same to them. This is business and so if they can't accept such regulation, they can do other business with the rest of the world but not US. However, we all know that they do need the US market.