I think I take your point (if your point was that such an attitude to political authority and legitimacy - he who rightfully governs always governs rightfully - is a key to all sorts of evils), but surely the situation given rise to by this ruling doesn't present that many direct parallels - yet?
In fact, to rewind: my understanding of this ruling is that it re-stated the post-Civil War constitutional settlement: that the powers of the Crown (i.e., the prerogative powers exercised by the government) when it comes to changing domestic laws are necessarily circumscribed by Parliamentary approval. Now, I'm not looking to Parliament to legislatively block any Brexit at this point - certainly Labour might seem to have adopted a very May-ish stance if
this is to be believed, and so much for a Lexit - for two reasons.
Firstly, even in a best-case scenario, I don't think the referendum result will be consequence-free from the point of view of the rest of the EU - we are probably now at a stage where 'good riddance' no matter what will be the governing sentiment there, but that's more of a gut feeling on my part.
Second, I have no trust in the ability of MPs of the two major parties to see past the pitchfork-waving types who have come to be so public recently. Their unabashed belief in the powers of the executive that must remain untrammeled for One and Only One Purpose is genuinely something to marvel at; in a sense, they would seem to share a parallel, naive belief in the power of well-deployed autocratic moments to the sort you described in your happy believers.