Use "demoralisation" in a sentence

1. And if this old woman, the pawnbroker, has been murdered by someone of a higher class in society--for peasants don't pawn gold trinkets--how are we to explain this demoralisation of the civilised part of our society?"

2. And if this old woman, the pawnbroker, has been murdered by someone of a higher class in society—for peasants don't pawn gold trinkets—how are we to explain this demoralisation of the civilised part of our society?"

3. They do not seem to have aimed at extermination so much as at complete demoralisation and the destruction of any opposition