"Progressives should not make the same mistake that Ernst Thälmann made in 1932. The leader of the German Communist Party, Thälmann saw mainstream liberals as his enemies, and so the center and left never joined forces against the Nazis. Thälmann famously said that ‘some Nazi trees must not be allowed to overshadow a forest’ of social democrats, whom he sneeringly called ‘social fascists.’
After Adolf Hitler gained power in 1933, Thälmann was arrested. He was shot on Hitler’s orders in Buchenwald concentration camp in 1944."
No, I would not. In an ideal world, Corbyn would still be the leader of the Labour Party while Starmer would head a moderate centre-left or centrist liberal party, and after the 2024 election, it would be Corbyn and Starmer governing together in coalition, resulting in a government that is slightly more to the left than what it is now.
But the UK’s system of elections is flawed and definitely not perfect, which prevents this.