Galaxy
You can bsolutely prosecute people for inciting violence on social media, what you cant have at the same time is Wes Streeting in the cabinet. Poor Wes Streeting, who I like a lot, but he is the example I am using.
You probably also cant have many representatives of the SNP but thats less of a problem these days.
I think that most people would roll their eyes at the thought of Wes Streeting being barred from office because of something he said as a student. As I've said, it would be a dangerous road to go down if we started dredging up comments out of context and holding people responsible for youthful indiscretions. If he had been in office at the time it would, of course, be different, as it would if someone had taken Streeting at his word and pushed someone under a train, but otherwise holding him to account now would simply be vindictive. I've only heard about that 'incident' on here - where was it said, and who is likely to have seen/read/heard it?
I know there is precedent for retrospective punishment, eg the young woman who was appointed as a youth liaison person for the police, and was then found to have posted racist and homophobic tweets or FB posts. I couldn't sleep last night and watched a programme about things going wrong for TV stars (enough to send anyone to sleep), and there was a story about a young Asian soap actress who did something similar and was dropped. I think it's very unfair to do that - she was a teenager at the time of the comment - and would apply that across the political spectrum. It would be the blandest of the bland who never said something they regret, and had been 'responsible' since childhood. Learning to temper passions is part of growing up, and my guess is that many, if not most of those throwing stones about these things are likely to live in glass houses. Ruining someone's life, or taking away opportunities they have worked for feels spiteful to me.
If a soap star or police liaison person says things like that whilst representing their employer it's one thing, but going back decades to find indiscretions is quite another - it's no wonder mental health is so poor these days, if people are worrying about the dodgy joke they passed on in in 1976 or whatever.
Incitement is different. When there are riots on the streets anyone encouraging others to join in, or suggesting particular acts such as burning buildings is not remotely the same as saying something hot headed in your teens.