A shout of “They’re separating him from his family” rang out as a protester prevented the deportation of a violent gang rapist in the United Kingdom this month. The other passengers applauded the gang rapist, not knowing the context, as law enforcement escorted him off the flight.

Sudden outbursts and targeted rage are becoming the standard tactic of what I call “pop-up protesters” when they witness any legal deportations, even deportations of a convicted gang rapist.