We were once a proper country
Unlike the SS, the Gestopo wasn't created by the Nazis. It was an old institution, older than Germany. It was created as Prussia's secret police (under a different name). When Germany was unified, the Gestopo because Imperial Germany's secret police. And later, the Weimer Republic's secret police.
Through it all, the Gestopo underwent many name changes and reorganizations. Under the Weimer Republic, the Gestopo spied on all enemies of Weimer, Communist and Nazi.
When the Nazis came to power, they renamed it the Gestopo, reorganized it, and filled it with Nazis.
The FBI is like that. It's populated by, and serves the current government. Under Reagan, it banned homosexuals and defended Christians. Under our new regime, it's filled with homosexuals and trannies, and targets Christians.