1. Police usually don't carry guns here
They don't carry, but they have them. That's kind of the point, although I find it slightly more sympathetic than Sweden, where patrolling cops
always carry a 9mm Sig Sauer.
2. why would they kill me?
Why would the Nazis kill the Jews? Why would the NKVD kill people just on suspicion? Why would the Chinese military run over totally unarmed peaceful demonstrators with tanks? Why do they kill gay people in Iran? Why did Saddam gas the Kurds?