They are not humans is group of some terrorists who are using name of a peaceful religion . They must be called animals.
First step, dehumanize people. It allows for inhumane things to be done.
Worked well for the Nazis.
When the rest of the world gets disgusted enough, the animals are stopped.
Worked against the Nazis.
No matter what a human does.
They are still humans.
I know it is easier to think of other individuals as less than human. But they are not. They are individuals, they have human emotions just like you. They eat, breath and deal with every day things.
Several individuals executed other individuals for their own individual reasons, as humans.