I disagree that they had other options. Their number one priority was the protection of those children in their care. They did exactly as I would have done or any other reasonable caretaker of infants and children. No one enters that don't belong period. You got my child, that better be your rule. And two unknown guys in plain clothes don't qualify as someone who belongs. I don't care who they say they are or what badges they may possess. If they are legit, they can call for a patrol car to prove their status and their business.
All I see the daycare workers did wrong was when the men began kicking and bamming on the door they should have called 911 immediately.