When did ideas get muddied by personality? I see this in the whole Ender's Game debate and in this Fisher debate. We need to compare ideas outside of the person

When did ideas get muddied by personality? I see this in the whole Ender's Game debate and in this Fisher debate. We need to compare ideas outside of the personality THAN we can separate the idea for the person. In our history (Historical Philosophy/Theology Major) you would be apsolutely shocked at the lives of great thinkers and disapprove so much of their lives but MOST people don't know. This is the issue with open lives we know so much more about people. It is never just a book or an idea we can learn maybe to much???