That's distinctly possible, especially if it's Himmler or Bormann. With Goering, I think it's less likely.
The end result is ghastly for Germany, on a Decisive Darkness, Anglo-American Nazi War, or How Silent Fall the Cherry Blossoms level, especially if the chemical weapons are used against civilians at all.
Vegetarian is dependent on whether the Germans use WMDs on Britain. If they do, all bets are off and Germany discovers that, when it comes to getting nasty, sane beast mad hands down, and that when it comes to evil weapons, few people are more inventive than the British.