You could make a moral argument for it. But we should NOT support that. And i think the US framers were clear on this topic.

Personally, I would say no.

However, a country persecuting its citizens doesn't bode well for the neighbor's citizens own security or well being, which is usually why it often leads to some form of govt vs govt war.

A government should not act with force until its own citizens are suffering, meaning, if brazilians themselves were hurt because of US policy.

Note that this is pretty much how Russia argues with Ukraine.