Assuming, they are acting in good faith and want the bloodshed to stop (well, at least that's the facade they're trying to project), then why would they try to tank peace negotiations when they are ALREADY HAPPENING?
Why not AT LEAST PRETEND that you want peace and have "high hopes", and then be "oh, we're so disappointed, I guess it's TO THE LAST UKRAINIAN" now...
But why sink them BEFORE they even start? Kind of makes it obvious that jew wants slavs dead - no "ifs" no "buts".