The Brexiters really are extreme reactionaries and they now control the Tory party:

UK risks Scotland split, more austerity after a no-deal Brexit - Hammond

An opinion poll published this week showed a majority of Conservative Party members - who will make the final decision on Britain’s next prime minister in July - would accept losing Scotland from the United Kingdom as long as Brexit is delivered.

Scotland really isn’t a viable polity on its own. As part of the EU it would be one of the smaller states and dependent upon a lot of support from the populous EU states.

But if the Brexiters get what they want, then so be it.