What makes you confident about any of that WM ?
Corbyn came in with a new broom and the Govenment and media raised this and threw everything they could at him in order to make sure his ideas weren't accepted - he was "The Spectre that haunted Britain and became 'The enemy of the State'
Of coutse those ideas were "unpopular" - we've had decades of Labour politicians who sold out their principles in order to gain a degree of popularity
Given the racism statistics in Britain, I would not hesitate to suggest that any political party which adopts a "send 'em back to where they came from" policy would shoot up the popularity poll tomorrow
If being popular is all that matters, why not adopt that approach ?
That would be populist opportunism - that's why not
Jim