I don't think you can really draw a comparison between the two. The Troubles didn't start simply because the Irish wanted to control their own affairs they started due to the fact that Irish Catholics were being heavily discriminated against.
Recent events in Scotland however, display that the political situation/plight is not different enough that you can merely dismiss it as you do, almost half the population of Scotland want self-rule (for the record, I'm not among them). The details may differ but the desire is equal.
For Scotland you can pretty much talk about the Scottish people as a more or less unitary group. The devolution referendum was decided based on debate and argument. Sure there was a strong nationalist component of it, but that didn't completely override all other factors. It was just one of many important factors, and you can't argue that someone to voted Yes or No is clearly more or less Scottish then the other. Factors other than national identity play important roles. For example if the UK votes to leave the EU, that will likely play a decisive role in many Scots switching to prefer independence so they can stay in the EU.
When talking about the situation in Northern Ireland, you can't really talk about 'The Irish' as a group the way you do in your post. A vote on devolution there would have nothing to do with debate or weighing of pros and cons. Staying in the EU or not would be a footnote. Any such vote would be a straight down the line sectarian census.
Scots seeking independence is rather different from the Irish situation mainly as the driver is not religion. For the record I agree with self-rule for Scotland, but am a Sassenach who would wish to move to post-independence Scotland. ;)
You're right about sentiment in Liverpool though. That probably stems from the port and strong association as the point of migration leading to a large Irish community.
In JavaScript terms: Is Ireland === Scotland? or... Is Ireland == Scotland?
Apart from sectarian bigotry, which I don't think was ever quite as institutionalized as it was in NI, what human rights abuses are you referring to in the last ~100 years?
As a "Yes" voting Scot I have to say that I think the rights of Scots were treated with great respect by the rest of the UK - we wanted a referendum for independence and we got one.
I think most (not 'some') people would disagree with the hardline nationalist view that we've endured 300 years of human rights abuses since then.
The Troubles were not about having a "resolution", and indeed having a referendum within the Six Counties would have produced a result for staying in the UK. The troubles were about discrimination and violence: both street violence and state violence. The solution involved the reform of the RUC and the imposition of human rights law and anti-discrimination law.
Whereas the Scottish question has not been characterised by any significant level of violence on either side of the politics - there's a bit of it around the Old Firm, but it doesn't pervade public life in anything like the same way. Scotland got its first devo referendum in '79, albeit sabotaged by the turnout requirement.
Unless there's more to this than it sounds like - why would people assume an agency in some fictional stories was real?
It does open up a big-picture question of "what is a fact in politics", when operating in the face of official denial and secrecy. MI6 was mentioned in the popular, banned memoir Spycatcher, published in 1987: https://en.wikipedia.org/wiki/Spycatcher
He also disliked the IRA connections, apparently, but smuggling via Ireland was easier than via France/mainland Europe. In the politics of the time, and perhaps from being Welsh, it was easier to excuse the IRA, I think a fair few Welsh and Scottish subjects of HM Elizabeth II would have had sympathies with the "cause", although not with the manner in which it was being fought for (violence versus Scotland's wait of 30-40 more years for a referendum; some Irishmen obviously wanted a resolution within their lifetime).
The Mr. Nice moniker comes from having bought a passport/identity from a real person by that name (Nice as in the French town), which he then traveled under and adopted. It was genuinely his name for a while.
MI6 was known to exist even it not confirmed by the govt. Ever heard of James Bond? Myth rooted in fact, every UK citizen who has read Flemming/Greene/etc knew there was an MI6.
Whatever you think of Marks, he does have a folk hero side that appeals to the British, someone who found his way into the establishment, but then rejected the banality of that life and instead lived a life most of us haven't the gall to even attempt. I think that is why he is appreciated by the British press.