In fantasy lore orcs are corrupted humans who can interbreed with humans. That is, the term is not dehumanizing. As for the racism argument, orcs are hated because of their actual behavior of killing and looting. Not because of prejudice. It's very much postjudice, unless you read funny fantasy. Exactly how Ruzzians are judged by their actual actions, not by their looks. Your efforts to blend that with racism weakens the fight against actual racism. Shame on you!