Came down on the side of them - Idioms by The Free Dictionary
come down on the side of (someone or something) (redirected from came down on the side of them)
come down on the side of (someone or something)
To establish one's opinion or view as being in support of a particular side of an issue. I think the jury is going to come down on the side of the plaintiff. This issue is unjust, and as your mayor, I promise to come down on the side of equality.
come down/out on the side of somebody/something decide, especially after considering something carefully, to choose or support somebody/something: After much discussion, they finally came down on the side of nuclear energy. ♢ In the argument that followed, my father came down firmly on my side.