So they don't like GW. Who cares?
"Like" as in a trading partner, a democratic country that has open import and export channels with us, that sells us stuff and lets us put lots of US brands there, and has people that buy our stuff. Many US retail corporations have made major inroads there. We do not have trade restrictions with them, (obviously, since you can buy weapons made there), and thus it's a Friendly Nation.
This is not something you'll find in socialist countries like Chavez's, due to the fact that he keeps taking stuff away from corporations and nationalizing it. That tends to scare off people from building and investing.
Dealing with a democratic nation with friendly trade status for energy needs is a lot easy than dealing with a tinpot socialist who truly hates your entire country, meets with the rogue's gallery of the world's nastiest dictators on a weekly basis and wants to cause trouble whenever possible.
In any event, a closer democratic country that might have found an oil reserve they'd sell from to us (the new Jupiter field, besides the 8 billion barrel Tupi found last year) would be good for us in the long run, and bad for people in the sandbox who right now have a stranglehold on us. Might be bad for shootinstudent's desires, though, so hey.
I don't think anyone would seriously doubt that Venezuela's elections are far, far more free and open than Brazil's. So in that sense, there's really no debate that Brazil is not somehow "more democratic" than our enemies in Venezuela.
But yeah, look at the polls-more than half of Brazilians want to see less U.S. influence in the world. I think your confidence is misplaced.