It took part in a referendum in 2006, and as is the Scottish tradition with referendums - it lost!
(In a poll to decide the official unofficial Scottish National Anthem to be bawled out at football matches it was comprehensively beaten by the even more xenophobic Flower of Scotland).
Doubt away as long as you like; although I'd call it denial.
Now - and be very clear about this - I do not say that all Scots are raging Anglophobes. But a fair few are, and your assertion that how they treat you depends on how you interact with them is rather naive. I'll give you an example of...
My experience was primarily with the east side and central Scotland. 45% of Scots voted to leave the Union; the other 55% realised where the money came from.
Absolutely this. To be fair, on a one-to-one face-to-face basis it's generally OK; the girls I slept with were friendly enough! On the whole though, it's a racism thing - 'you're OK, but the English in general are *******s and we hate them'. ABE rules and all that.
Believe me, the amount of 'they fekcin' English' - blamed for everything - you'd not come out with sympathetic crap for the Scots. A bunch of racialists, the lot of them, if ever there was one! I've lived there and experienced it first hand.
Trouble is, the SNP is like UKIP in that both are essentially single issue pressure groups. The other trouble, of course, is that the SNP have a position of power.
Although I have supported UKIP in its aim of getting us out of the EU, I still wouldn't want them trying to run the country...