MRM, I'm not sure I buy the delivery problem with chemical/biological weapons. After all, the Germans were dropping bombs into London, no? While I agree that a tactical use would have been challenging to get right, a less precise "Drop nastiness into civilian populations" would have been very demoralizing, at the least.
It also occurs to me that using chemical booby traps to cover a retreat would have been a pretty effective delaying tactic. The VC used much smaller booby traps on GI patrols in Vietnam with great success, forcing troops to move very slowly and having huge impact on morale. If the Germans had used chemical weapons on a medium to large scale to cover their retreat, it could have forced Allied troops to move much more slowly. As it was, we had a hard enough time holding the advance positions that we had taken by paratroopers, didn't we? It might not have taken too much of a slowdown to change things pretty dramatically.
Just playing armchair devil's advocate.
