The link below contains a video showing part of the rescue work with the “white helmets”. The video totally precludes any poisoning with nerve agents. All the rescue and hospital workers would have been contaminated and would have started to show symptoms.
Just to give you an understanding how poisonous these agents are, I once was at a dinner with a British lady who had worked for the British Defence Research Agency. She had been in Angola during the civil wars studying the effects of gas war. The Cubans used nerve gases. This was known by the South Africans but kept secret not ot worry the “home front”: Once this lady had visited a hospital tent where one soldier who had been poisoned 24 hours previously was lying receiving Atropine drip. The soldier coughed and a tiny speck of saliva landed on a spot where her protective suit did not cover the skin. Minutes later she started to develop symptoms and had t o receive Atropine drip next to the soldier.
You do not carry victims of nerve gas poisoning unprotected if you do not want to end up in the same position yourself.
Distortion of thought is the key to evil's success.