Ouch , bad bad bad .....move.....I would have moved around behind him and waited on my sammich and watched in the ready from that vantage point.... but anyone walking in with a hoodie up and sunglasses on certainly sets off my radar and makes me nervous (regardless of skin color). .... I wear hoodies all the time in the winter but never with the hood covering my head and face, hell I take off my hat and sunglasses if I walk into the bank.
Concealed Carry doesn't exist in Brazil. So your 'vantage point' time should have been spent looking for a quick exit incase things went down.
He's either (a) a criminal or (b) a cop.
Either way, given the crime rates in Brazil i don't blame him for being edgy as ****.
In America, i think his reaction would have been stupid or extreme. But in Brazil, this stuff is very common. crime is rampant.