I have seen this too. Is it too hopeful to suggest that some of it might be from sockpuppets who are trying to smear Corbynites by association? I know that in light of Livingstone and Jackie Walker etc it probably is.
so many blatant troll accounts about, and of course the Bla*rites etc quote / RT without a second thought , eg John 'fucknugget' Ferret monday :
I had another two blatant ones from mon / tues, have lost them both , one of them the RT gave a feeble ' sorry ., didnt realise' when had up on it, but you know they know
It's the type of thing that gets likes and upvotes from progressive Corbynista types even if they don't produce it themselves. I haven't been paying much attention to what Labourites have been saying until this past year, but my impression is that there are some dark traditions within the Labour Party that have been awoken or have returned after the Blair/Brown/Miliband years. I don't think it's a new fangled thing. It's an older generation finding an audience with a younger generation. That comment comes with the caveat that I only have a small sample to go on. But it's certainly not just a bunch of trolls. (I don't think Livingstone's or Walker's comments are part of this though, they're more just general provocation, the nationalist bite isn't there.)