You don't gas people with diesel engines.
What was the fuel used to burn a million people?
Why have you only got a reconstruction fireplace?
What a pathetic site that was. Is that the best you can come up with?
Not only can you gas people with diesel engines, but even today with modern engines, people commit suicide with a car and a hose pipe.
Saying a site is "pathetic" without a hint of evidence is about as ironic as you can get.