I have a feeling Liddle may have at one time appeared on some TV programs.. perhaps Have I got news for you, maybe some news discussion type programs.
I suspect he's a freelance journalist who writes content aimed at the target audience (click bait) so I'd take everything he writes with a pinch of salt.
He's probably in the same mould as AA Gill or Will Self earning money writing as a self professed pretentious intellect.. whereas he's probably just a bit of an arse scrabbling around for his next column.