Trying to prove to you something that you already know, but are pretending not to know?
Now you sound unhinged. I don't live in your bloody country, I don't follow the minutiae of Democratic party politics. All I "know" is what you allege, and you won't back up your allegations.
This is a fairly left wing UK website's page on the US. It very much supports Corbin, but there's no mention of Sanders on the US page. That's how relevant he is to Britain's progressives.
You talked about specific posters on A2K who voted for Mrs Clinton. Why not give examples of them attacking Sanders post election?
So far your only sources have been anecdotal, (your anecdotes btw,) or far right websites.