That sounds way harsher than it should, in my opinion ...
It's harsh, yes. But simply factual.
It's also quite ironic that Harry jailed his brother
to keep him safe... after specifically taking great care
not to let the fae do
exactly that to him!
... I think it was the best of some bad alternatives ... this gave him a chance, small, but a chance ...
This is also correct, IMHO.
Harry
did do something "harsh" with Thomas... but not nearly as harsh as letting him get killed!
... No, Harry didn't coldly "stuff" Thomas in prison ...
Oh, I never said it was "cold" (in the sense of unfeeling).
But he did it... he did it unhesitatingly, despite knowing he was about to subject his own brother to intense torment. You can call that "cold," from a certain point of view... but if it was "cold" it was only that way by suppressing his anger and pain; to "coldly" do what needed doing, despite the costs.