It's unacceptable to discriminate against others.
Luke is in charge of HR and is asked about hiring a man of Arabic descent.
Luke wants to give his opinion of the man.
Luke tells the man to send his resume, and he'll look over his qualifications.
"Luke tells the man, ""We don't need any towel-head terrorists working here - forget him""."
The man turns out to be a good fit and Luke hires him.
Luke gets reported to administration, who fires him.