Equally Horrible Weapons

Putin is likely crazy enough or sufficiently evil to order the use of chemical or biological weapons against the Ukrainian people. He does not necessarily have to employ his nuclear forces to murder millions. Other weapons of mass destruction make you just as dead as a hydrogen bomb would. I am not certain that in the event Putin realizes his efforts so far have been in vain that he would not go to the use of weapons not used in war since World War I (poison gas) or World War II (the atomic bombs). Putin's depravity knows no limits.