>It doesn't seem like you disproved the claim that Brazil aggressively spies on its own citizens and, thus, that this is hypocritical populist rhetoric.
It can do whatever it want on it's own citizens. If they don't like it, they can vote them out of the office.
It's a third country spying on them (or on my country) I don't like.
For one, if I'm a business owner/scientist/engineer working on some stuff, they can do "industrial espionage" and give the stuff (or a heads up) to US companies/the army/whoever.
Second, they can use their spying on a country's politicians to influence that country's policy (like spying on a party they don't like in favor of a party that serve's their interests), do market and diplomatic moves against them, etc.
Third, who said foreigners never travel to the US?
It can do whatever it want on it's own citizens. If they don't like it, they can vote them out of the office.
It's a third country spying on them (or on my country) I don't like.