You also hit a major problem when you're comparing a belief system with a race.
When people say 'The world would be better off without evangelical Christianity', they don't mean 'fire up the furnaces'. They want people to stop believing in something that they think as a belief is harmful to society.
Its really a fallacious argument to try and make people who wish that a belief that they think is out-dated and harmful to go away look like they are trying to make a holocaust happen.
Edit: Lets take it to an extreme because we can, I think neo-nazis are bad for society. If I said 'I think the world would be better off without neo-Nazis' and then replaced 'neo-Nazis' with 'Jews' we hit the same problem. It makes me look like a racist. The same distinction exists in that sentence as in the previous one, neo-Nazism is a belief. Same with Christianity and atheism.
You're putting up a straw man by asking people if they would rather a belief did not exist and then replacing the belief with a race. You're comparing different things.
