Chemical weapons are humane

Certainly that was the view of British "bulldog", Winston Churchill.

He criticised his colleagues for their "squeamishness", declaring that "the objections of the India Office to the use of gas against natives are unreasonable. Gas is a more merciful weapon than high explosive shell, and compels an enemy to accept a decision with less loss of life than any other agency of war."

Not only did Churchill advocate the use of gas in Iraq and India he authorised the use in Russia. British aerial attacks using them began on 27 August 1919, targeting the village of Emtsa, 120 miles south of Archangel. Bolshevik soldiers were seen fleeing in panic as the green chemical gas drifted towards them. Those caught in the cloud vomited blood, then collapsed unconscious. The attacks continued throughout September on many Bolshevik-held villages: Chunova, Vikhtova, Pocha, Chorga, Tavoigor and Zapolki.