Its just politics. Labour has to be seen to reform. Corbyn isn't going to budge (he's been pro-Palestinian for decades) and it is perhaps unsurprising that RLB is sticking to her guns; she was Corbyn's preferred candidate.
O, wonder! How many goodly creatures are there here! How beauteous mankind is! O brave new world, That has such people in’t!
Before Corbyn made his statement Starmer had said that questioning the reports validity was a no no, so what did Corbyn do? It was a deliberate act by Corbyn designed to get the result it did, either that or Corbyn is thick as mince. Same with RLB and her tweet asked to remove it, she declined so was sacked.
It all stinks of "I can't be the leader so neither can you and I will destroy the party to stop you".
ETA the report said the Labour Party wasn't institutionally Anti-semitic and pointed at the fault lying in Corbyn's office....
Bizarre situation all round though. If Jeremy Corbyn is so fundamentally racist that he has had to be kicked out of the Labour party, then even the most dyed-in-the-wool Labour supporter would have to agree that it's a good job that he lost the last General Election and isn't Prime Minister.