It's not okay to support a evil leader.
A politician in Don's country wants to deport all Mexicans from his country.
Don has to decide whether to vote for the politician.
Don realizes that Mexicans have never bothered him and votes for someone else.
Don realizes that he doesn't have any Mexican friends, so he votes for him.
The man has one less vote, and Don doesn't have to feel guilty.
The man ends up following through on his promise, and Don feels bad.