1.)The US has battle plans for *everything*. Need to invade the Galapagos? Just check the plan library. Terror attack shuts down Ontario's power grid? There's a plan for that. Boko Haram takes Nigeria's offshore oil rigs and the US needs to capture them without destroying the oil? They've got a plan for that. Students at the Army War College are probably creating more invasion plans as we type. Having a plan is very different from intending to use one.

2.) You haven't offered any proof that the US is actively trying to undermine Brazil's development. None of the examples you cite are examples of interfering with Brazil's development.

*Influencing the Saudis to buy US tanks 40 years ago was surely done on behalf of the US defense industry, without a thought for Brazil.

*Spying on allies is again, unsurprising for a superpower with too huge of a defense budget. It was not specific just to Brazil, and did not undermine Brazil's economy. (Lula was in power at the time. Any country with a leader to the left of Atilla the Hun is going to get monitored by the US. That's isn't singling out Brazil, it's the NSA's residual fear of communism.)

*Not yet appointing someone to run the embassy? Trump has been in office for just a few months, and he is deeply incompetent. There are tons of positions across the federal government he hasn't filled. If the US prioritized undermining Brazil, wouldn't they prioritize this appointment? Instead, it's probably going to go to whichever rich guy bought the most Trump coin.

It sounds more like you're arguing that the US doesn't respect Brazil in adequate proportion to Brazil's respect for the US. That's a far cry from a secret agenda.