The US is een scary place... :(
Half of the American news I see seems to be about policemen making terrible mistakes (the other half is about the economy). I get that the officers are afraid as well since there's always a very real possibility the subject pulls out a gun, but a policeforce that sees everyone who isn't in uniform as the enemy may be more dangerous than actual criminals.
Its not so bad as long as you're white and don't have a beard, don't approach a public school, don't have anything darker than a vanilla complexion, don't wear articles of clothing that look remotely foreign, don't wear concealing garments like hoodies or jackets, don't protest anything, don't stand in the vicinity of a protest, don't talk to the police, and you can speak English if you still end up talking to a police officer.
Then its just a matter of not being in the same vicinity of a person shooting up the place/looking like he's going to shoot up the place, or a bomb planted nearby a nationally recognized event, or a gang war shoot out/hit, or anybody open carrying a gun, or Florida.