Animal cruelty VS [censored] violence (HELP to f

Question

Hello!

Working on text (on russian) about correlation between being cruel with animals and being cruel with humans.
Checking some facts. If you have any info about following questions, please help:
1. I’ve heard from some lectures, that Nazis took their methods for death camps from meat industry of that time. That the conveyor lines, technologies of mass murder were inspired by the meat factories of a time.

Looking for facts and historical data. Any confirmation on “paper” would help. Books, wiki, may be some video interviews of witnesses or historians.
If you know, where to check, where to read more about it, it would be great to get some links.

2. Gas chambers for pigs. Anybody knows when exactly the technology was put on the market? 
Same question - looking for facts and historical data, that will confirms, when it started and how exactly.

Jemirsai · Answer

Oops, the name of a subject was censored. Never meant to assault anyone. Should I call it "Reich violence"?

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