The traditional "golden rule", whether or not it stems from religious teaching, is inherently self-centred as not everyone would like to be treated as I would like. Humanism is synonymous with empathy and treating others as they prefer is a key factor in that.

We often analyze the beliefs of others, such as religious or political beliefs, without analyzing our own. The humanist strives to be aware of the role her personal biases, culture, priviledge etc play in her perception of the world.

We needn't be afraid of judging others as we should be judged ourselves. It is important that our judgement and the judgement we receive is not based on race, gender, sexuality, etc but that people who act abhorrently do not get to bypass judgement.