Cl’d, but like most of the beloved CL’s actual posts it’s important.
re: #95 sagehen

Pretty sure the manufacturers of Zyklon-B used that exact same rationale.

Zyklon-B

Prior to World War II (manufacturer) Degesch derived most of its Zyklon B profits from overseas sales, particularly in the United States, where it was produced under license by Roessler & Hasslacher prior to 1931 and by American Cyanamid from 1931 to 1943. From 1929, the United States Public Health Service used Zyklon B to fumigate freight trains and clothes of Mexican immigrants entering the United States. (Emphasis added)