Anyone with # background enough to give a background for this?

1. https://nu.federati.net/url/267445 [news sky com]
2. https://nu.federati.net/url/267446 [www theguardian com]
3. https://nu.federati.net/url/267447 [novaramedia com]
4. https://nu.federati.net/url/267448 [www independent co uk]

Is this the # equivalent of the # # actions in 2013-2016 attempting to prevent other potential Democratic candidates? It sounds worse (intentionally throwing the election by undermining the candidate), but was all this done with intent to prevent deep investigation and confrontation of antisemitism, or just attacking Corbyn for the sake of being against him and his platform?