"Before the referendum the Scots held a referendum on whether they wished to be a separate state, or part of the union. As a result they are included in the UK for what happens now with Brexit."

They did vote to stay in the union with at least part of the argument which was put to them being that staying in the UK was the only way they could guarantee they retain membership of the EU. How does that equate with what has happened since? Secondly democracy doesn't end there and in the last Scottish elections (after being pressed to do so by especially the Scottish Tories) the SNP confirmed in their manifesto under what circumstances they would consider having another vote. The two examples given were if there was a substantial and sustained swing in the polls towards independence - or if there was a major change in curcumstances with the example quoted in the manifesto being if Scotland is taken out of the EU against the wishes of the people of Scotland. The SNP won the election on that basis. The Scottish people then voted pretty solidly to stay in the EU. The Holyrood Parliament then later voted in principle giving the Scottish gvt the mandate to hold a second vote. Sturgeon has softened the position where the mandate stated if we were taken out of the EU there would be another vote to the present position of we will see what the deal is like before deciding if there is another vote or not. She has the mandate from both the Scottish people and the Scottish parliament. Some folks might not like that but we all have votes where we don't like the results.