If superpowers at the height of a Cold War could recognise each other and use the UN for dialogue to prevent nuclear war then I cannot see how this is not a good thing.

Giving a voice to a both sides changes this from a monologue to a dialog. The monologue has gone on long enough and it is clear that it hasn't resolved anything. So let them talk, let the world listen and let's see if a peaceful position can be found.