Were They All Objectivists?

Philip afoot talks about the experience of going to the cinema as been 19 forty five. She saw early footage that had come back from right after the liberation of the bergen bellson and bukenvald camps. One of the dominant strains moral philosophy at the time was subjectivism or emotivism, the idea that there were no objective mole truths. I wonder how hearing about the camps affected their attitude to that. Were they all objectivists?