Once again Nazis and the GOP are back in the news. This time it's Arizona's newly refurbished gas chamber.

https://www.nytimes.com/2021/06/02/us/arizona-zyklon-b-gas-chamber.html

This article shows that the reasoning against using inert gas is basically bullsh!te. As you can see from the article Arizona is going to considerably more effort to get their gas chamber functional, than they'd need to do with inert gas.

If it's possible to fill a chamber with poison gas and then evacuate the chamber safely all the while someone is strapped into a chair, then it's obviously less difficult to do with inert gas.

Nowhere in the article is inert gas mentioned as a viable alternative. Which goes to reinforce my hypothesis, that the real reason that inert gas is not used is that the GOP are spiteful vindictive and cruel at heart, and that bottom line is that inert gas is not a bad way to exit. So it's not the death per se that is sought, but rather it's the terror that they want to inflict. Which makes proponents of death by bizarre means no better than those they accuse.

My daughter is a vet tech and was employed by city of hope one summer to take care of their lab animals. The standard procedure to terminate their lab rats was to asphyxiate them with co2.  They do not go quietly.

CO2 in a underground Ferris wheel type configuration is one method for large scale pork production.