Really?
Lets see now..
The Humans were in Azeroth minding their own business, then one day a portal opens up in the Black Morass and a Horde of 1000's blood thirsty creatures pour in.
These strange creatures attack and massacre the first Humans they come across, and it's soon apparent that their sole purpose is to wipe out the Human race, down to every last woman and child.
The Humans fight tooth and nail against these alien monstrous creatures and refuse to get wiped out. They eventually win the war and Orcs are routed and disperse into the countryside, continuing to harass Human civilians, attacking villages here and there.
The Humans capture any Orcs they come across and hold them in camps.
Now, this makes the Humans evil? And the orcs are suddenly victims?
You'd think that it was the Humans that sent their Armies into Draenor with the sole purpose of capturing these peaceful creatures so they can keep them in internment camps in Azeroth..
What kind of warped logic is this?