I don't think it's a secret that the majority of readers on HN are left wing I have the feeling that the quiet majority of HN readers are politically moderate

I don't think it's a secret that the majority of readers on HN are left wing I have the feeling that the quiet majority of HN readers are politically moderate and are curious to read a variety of reasonable perspectives on either side of the political divide in order to help themselves form a rounded worldview. It's a noisy minority further towards the extremes that might give the impression that HN is strongly biased, and the direction of the apparent bias differs depending on the topic.