[ If he hadn't recently been shot at-- in public-- by Dameron, Ren likely would have reacted to the news very differently. He would have reacted in the way that Hux was expecting, with indifference and, perhaps, insultingly-worded 'advice' on how to prepare for the inevitability.

But right now, he takes it as a personal insult, a slight against his own perceived weakness, because he had, for the most part, been doing his best to keep his violent impulses at bay. If he attacks one of the rebel scum, even in self defense, he knows full well that he will always come off looking like the instigator, regardless of the truth.

A mad beast to be put down, as the gunshot wounds in his hip and shoulder remind him daily.

And this is the result: they've grown so bold, so certain that there will be no repercussions, that they threaten Hux openly and without fear. ]

Very well. [ Trying his best to sound measured, like he isn't itching to grab his lightsaber and hunt some Resistance fighters. ] I'm sure I don't have to remind you to carry a blaster. The pilot-- Dameron [ He spits the name out with so much contempt. ] won't hesitate to shoot in broad daylight.