I'll just add this. The SNP's raison d'ètre has always been the achievement of independence for Scotland. However, their view of their own party has now taken a complete about turn.
It used to be that they'd explain that - after independence - the party would split up and people would be invited to vote for Tory, Labour, Liberal etc to govern Scotland. There was no suggestion of the SNP (which was clearly made up of people with very disparate political outlooks) trying to cling onto power.
At some point, that notion seemed to disappear into the ether and there was a push for them to frame themselves as the most righteous party ever...and suddenly there was no question of their ever stepping aside.
It was Alex Salmond who started the push to the left, but he clearly didn't envisage the extreme views being taken now or the power complex being displayed.