There's little doubt about the class element, twas ever thus, however Gramsci wouldn't have understood the methodology being used today, the technology has allowed distraction for confusion and allowed enough layers of detachment to allow a guilt culture to foment within itself so that sub divisions of blame can be attached. It then gives knobends like Yaxley a platform. That solidarity is tainted by self preservation and the replication of capital ideals amongst the labour movement and working classes. As long as they percieve a layer or two below their lot will generally stop them short of revolt.
The old political allegiances are being redrawn. Age is a big differentiator now. There are layers of working class communities, outside of big cities (which benefitted from EU & Labour money in the city centres, as well as the universification of society) that have many older and quite left behind members of society. At one end there are not a lot of opportunities for people, and at the other, the opportunities there are are now in areas which are more individualised, atomised or underhand.
I spoke to a bricky a couple of years back and he said in the 70's he was on a sites and there were hundreds of people with a shared sense of purpose, ethos, values and goals who relied upon one another. It was this sense of collectivism that underpinned the more left leaning ideas, not the fact he worked with his hands, or outside that made him working class. This is an idea the majority of the political spectrum can't grasp. Now he works on his own much more, he's almost self employed, he earns more (good luck to him) but depends solely on himself.
When people talk of Ukip winning "working class votes" often what they are talking about is how jobs that were typecast as working class are now quite middle class jobs is outlook, prospects and pay.
This shift isn't helped by huge sections of the left that don't really understand what's gone on. The worst aspects have embibed the language of neoliberalism around identity politics and just want to talk about themselves (and experiences that are another world to people who sympathise with Robinson). Others tactically just want to build strength where there are more receptive ideas, i.e. younger people in university cities.
There's an issue of gender here too. The left has been terrible on this and continues to be.
Either way there's a space for people like Robinson. He hasn't had to do a lot, but he looks the part. Much of the intellectual ground work has been done for him initially by the BNP and then latterly by Farage but he brings some glamour and swagger to the part. Sexual violence hasn't been taken seriously by the ruling elite in this country and the left have failed to take the issue seriously, so then the right get an opportunity to put a spin on it. You can see where he gets success from.
His supporters will be quite emboldened again, but they are not all fascists. Many are just frustrated the world has got worse for them over a generation and he gives them a narrative they can relate too. I sense until the left become confident enough to emerge out of their (our) bubble and start engaging with people he will continue to have a foothold.