A few thoughts on this by @ProfTomkins on why the Scottish Conservatives no longer think the backstop is a threat to the Union, when they appeared to do so a month ago.https://www.scotsman.com/news/opinion/brexit-where-raab-and-mcvey-go-wrong-over-threat-to-union-tory-msp-1-4830439 …
Scottish Tories by and large want a soft Brexit and would happily keep us in the customs union and edge us back to the EU. No backstop needs activated if UK capitulates. They cannot move on backing Remain so strongly and this is all they have compared to no deal. @TheBluetrot