The protesters that blocked a deportation flight, and face imprisonment, gave one of the deportees the chance to win an appeal. In other words, his intended deportation would have been a miscarriage of justice.

That narrowly averted miscarriage of justice would not have been an accident, but rather the intended stochastic result of a policy of haste designed to excuse violating people's rights. The charges against these protesters are meant to reinforce that "hostile environment".