It is no one's fault but their own that they chose the method which put them in conflict with the law, and now have to serve time. The sentence was appropriate, even mild: they could have gotten seven years but seven years' upkeep would be expensive. Maybe they can spend their two years learning some manners and sewing mittens in the prison shop, but as old as they are, they should already have learned how to respect fellow human beings and should already have found a useful occupation. Two years probably won't be enough for them to learn the difference between protesting and criminal behavior.
But at least they won't have to serve their time in a US jail, where they would learn nothing at all except how to game the system and lie for more sympathy.
And with any luck they'll learn to love Big Brother as well.