They're only remorseful because they've been caught and are being held to account for their actions. Absent that, they'd still be out there, encouraging the violent overthrow of our legitimate government. Throw the book at them.

Capitol riot defendants facing jail have regrets. Judges aren’t buying it:
https://www.washingtonpost.com/local/legal-issues/capitol-riot-defendants-regrets/2021/02/26/b3d06e3e-76b1-11eb-9537-496158cc5fd9_story.html