If that is true it is a major mistake by Labour. There needs to be more talking, not less.
I think this fairly recent piece by Peter Hain and Daniel Levy has been linked before, but it is worth a (re)read as an attempt to understand what is going on and suggest a route forward. I don't agree with all of it (some statements don't match my experience) and I doubt there will be the space and goodwill needed to make it happen, but at least it is a thoughtful and comprehensive contribution.
https://www.opendemocracy.net/en/ope...e-way-forward/