Hitler didn’t start by sending Jews into concentration camps. He started by getting elected to the Reichstag, then getting other right-wing parties to back his play to become Vice Chancellor. When he took power, the first thing he did was outlaw labor unions and the Communist party.
In other words, fascists don’t start out by sending people to the gulags. They start out by scapegoating them, inundating the populace with propaganda depicting them as “criminals” and “animals,” so that by the time the camps are built, the population is perfectly willing to send the scapegoats (and anyone who opposes Dear Leader) there.