Bear in mind that in no way am I suggesting that the Scottish voters will have seen a seismic shift in support of leave suddenly. Maybe 4% shift in certain areas at a guess, i'm just making the suggestion that the reason you're seeing this animosity and more vocal brexit voices, even in places as Scotland, is that possibly some remainers are as angry as the leavers are that we haven't left the EU, and accuse our own Parliament for failing to implement a democratic decision undertaken by the electorate.
That although they are still remainers and would vote to remain in another referendum, they still agree that we must leave the EU on that basis and that Parliament has taken way too long due to their own pettiness, infighting and bickering, to implement a satisfactory conclusion that delivers upon the promise they all made in 2016 before the referendum, when they voted to invoke A50, when we voted for parties that made leaving the EU part of their manifesto in 2017, and yet still, have failed to do so.
They've not changed their mind on support of the EU, they've possibly changed their minds on opposing the decision to leave and reject the notion to hold another referendum.