To me, what you write about "proves" that much of the moderation is based on personal bias. Because moderators are people.  Some bias may be politically motivated, some bias may be instilled in the future moderator when he/she was 4 years old and mommy or daddy or her used-to-be- best friend did or said something that was branded into his/her brain-pain for all time.  We will never know for sure.  And, just to make life more interesting, the same moderator can be very intelligent, what we call "level-headed" at other occasions.  

And love dogs, too.