So the Tories used sophisticated campaigning techniques on credulous Northerners* to create a new voting phenomenon?
I think it’s far more rational to believe that what we have here is blame-shifting excuses by activists added to Johnson benefiting from the well-known phenomenon of the political honeymoon period. And the fact he could offer a claimed resolution of Brexit, which was becoming a bore.
As wise old political heads, such as (I’m afraid) T Blair, predicted, the pre-Brexit election was a trap. See also Steve Richards: "Historians will wonder with good cause why J Corbyn and J Swinson gave B Johnson an election on the date he wanted and at the height of his prime ministerial honeymoon. They were leaders in a hung parliament with considerable powers to determine an election timing and much more. 8:05 AM · Nov 17, 2019"
https://twitter.com/steverichards14/status/1195976223270281216 No wonder Cummings was reportedly so desperate for an election.
Plus, and it’s the very, very big plus (as the post-election polls showed), Jeremy Corbyn was a deeply unpopular prospect as Prime Minister.
* See 1:42 in particular…