You want to be governed by people who you perceive as ingroup. Some people perceive Khan as outgroup.
So then the proper way to word the the question was not what if they had my attitude, but rather what if they had a different attitude that I don't hold. And the answer is that in that case, I would disagree with such people.
Some brexiteers insist that great britain remains part of europe. That is certainly true in the same sense in which canada is part of america.
You don't want to be governed by your fellow europeans, who you perceive as outgroup. You want to be governed by those europeans you perceive as ingroup: Your fellow british.
Isn't it clear how scots might not want to be governed by the british in general but rather by scots in particular for the same reasons?
You seem to be saying that because I set boundaries around one group, then I must agree with anybody who sets boundaries around any group. Like the person (I don't remember who) who seemed to be saying that if you want to be governed by British people, that's like wanting to be governed by men, or white people, or whatever.
But it's just not. You might as well say "your favourite food is carrots? Well what if somebody else had a favourite food, but it was arsenic! What then, eh!!!" As if accepting the principle that one has a favourite food means that one must accept that anybody's favourite food is an equally good idea.
But it's not. No more than having loyalty and common cause with any particular group of people - British - means that I have to accept that it's a good idea to feel that way about men or whites or whatever.
Yes, apparently a majority of scottish people don't think that way. That's the point. What if everyone thought like you?
And yet again, if everyone thought like me there would be no such thing as a Scottish independence movement. And that will remain the answer no matter how many times or how many different ways I'm asked the same question.
Now if you want to form the question properly, as something like "Well what if everyone wanted to be governed by a particular national group as you do, but with different groups in mind... and in the case of the Scots, that was other Scots... what then!!!"
Well, then there would be Scottish independence. And should be. And might be, for all I know. That would make me sad, but so what?