What then of Scottish Unionists? Are their views also "sincerely held" but "not valid?'
During the 2014 Campaign, there was a lot of traffic online that spoke of Scottish Unionists as "Quislings" and "Traitors" who 'must not be allowed to suceed.'
The SNP countered that people said nasty things about them also, true, but that was personal abuse, which was childish and wrong and quite different.
The 2014 Prospectus was one where Scotland would be analogous to the Republic of Ireland, with a common travel area and Scots permanently entitled to residence, franchise and citizenship of what was confusingly, deliberately, referred to as, "The Rest of the UK."
More than this, it would be Ireland Plus Plus Plus, with independent Scotland having a seat on the board and by implication a veto on the Bank of England, unlimited supplies of pound notes sent north by removal van to order, Royal Navy warships built in Scottish yards but the Royal Navy and its missiles expelled from Scotland, etc. Truly Cakeism on steroids.
Now, with the UK out of the EU and the SNP committed to rejoin, with the current mess over Irish trade there for all to see, it would be very interesting to see Sturgeon's new prospectus.