Lula is neither anti-US, nor is he anti-NATO. He is against a single country having hegemony over the globe, against US meddling in Latin American elections (including with trade policy as of late), and against huge defense budgets.
Why do Americans accept that their democratic country is actively intervening in other countries elections? It's grotesque. The US security establishment has been allowed to run amoc for decades and they have destroyed the values that made the US country that people admired across the world.
The people in charge didn't run on this. Most of the real orchestrators are appointees, anyway. They're about to get a reality check fairly soon. I wouldn't be surprised if Hegseth were sacrificed. Rubio, the real brains behind the operations, will probably hold on somehow.
If Americans elect Rubio after all this, or resoundingly reelect a Republican congress, I think you have a better claim.
Tl;dr they don't accept it, but they keep getting tricked
To me it often if feels like South American countries themselves are stuck in an eternal pendulum of electing corrupt left-wing populists after corrupt right-wing populists and swinging back again.
That's representative democracy. There's not really any practical ways to delegate power without enabling corruption, so corruption is more or less inevitable without radical levels of transparency and public oversight.