He is not.
He is merely quoting Goebbels' propaganda of the time. The "negotiations" were about establishing a pretext for invasion of Poland. Hitler was privately livid over that "Schweinehund" Chamberlain for depriving him of his war with the appeasement at Munich.
The plan for Poland was to demand so much that Poland could not possibly comply.
Pat makes a very simple point. That is all, and to make him a Nazi propagandist or mouthpiece for Goebbels you need to find something else he said and not this, that refusal to negotiate can be fatal.