Complex sentence: People who endorsed such arguments were found to have less moral concern for animals and attribute less consciousness to them, to be more supportive of social inequality and hierarchical ideologies, and to be less proud of their consumer choices.
Split into simpler sentences: People who endorsed such arguments tended to objectify animals, have less moral concern for them and attribute less consciousness to them. They were also more supportive of social inequality and hierarchical ideologies, and less proud of their consumer choices.