did you read the source where the germans while constructing concentration camps refrenced and studied the gas chambers on the mexican border or not, because they did.
Using Zyklon B in a gas chamber and using it to disinfect clothes are very different things.
Shoving people into gas chambers against there will because they are foriegn (not just there clothes, people) was invented by America, the Nazis just turned up the concentration.
This shouldnt be suprising to you, america is worse than Nazi germany; the Nazis where stopped and defeated, Americas genocide succeeded against the native american population and is ongoing againt the african american population.