He's creating in his sick little mind a justification for “the ends justify the means”.
People want to laugh at him for making such stupid statements, but in his mind he is simple creating the worst demon he can possibly think of as a way of justifying any action taken to stop them.
The “demon “ must be stopped by any means.
When the mind starts slipping into this type of madness, you get people like the Weather Underground calmly talking about the extermination of 25 million of their fellow citizens simply because they disagreed with them.
There are two sides to that coin.
The one side is that their end goal, heaven on earth, total human actualization, is worthy of any means necessary.
And, as a correllary, anyone that stands in the way of this goal can be destroyed or exterminated with no, or even positive, moral implications.