What they are doing in that article is assigning things which other people are alleged to have done, to Jeremy Corbyn, because he was in charge.
That's like saying that I'm a Nazi, because I'm the custodian of a hobby, which unfortunately includes a minute minority of people (usually in the USA) who fetishise Nazism and/or are active Neo Nazis.
It's like saying YOU are a racist because you hand around with others (at the football) who are...even though you don't really hang around with them, you just happen to be in proximity with them.
In short, it's cheep, and it's bollocks. Corbyn's no racist. He's an extremely right on and 'woke' guy. He's the polar opposite. If anything, he gets daggers for going to far in the opposite direction and supporting the underdog too vociferously and exposing himself to criticism for it.
I also prefer Keir Starmer I want to just add. Corbyn was always a bit 'wet' for me.