JE I disagree. It is the intransigence of Boris Johnston and his ilk that is fuelling the demand for a second Independence Referendum. More and more Scots are disgusted that we have to go cap in hand to a man who couldn't care less about Scotland, who is hell bent on taking us out of the EU, when a big majority of Scots voted to remain.
As to the problems of a border - as I have suggested before, set the border between Scotland and England (much simpler than the NI/Eire border) and let remain voting NI, Scotland stay in the EU.
For those who question whether Scotland would be welcome in the EU, I would point out that Scotland is currently in the EU and Scots are currently EU citizens. If Scotland becomes independent of the rest of the UK during the Brexit negotiations and transition period then it will be able to REMAIN in the EU, without the need to re-apply.