Good essay. I think that while JKR may not have big blatant moral messages, such shouting from the rooftops that Sirius and Remus are in love and should be allowed to marry and adopt, she has set up a world where significant discrimination occurs. Such as societal discrimination towards Remus and social discrimination against Hermione. And while we don’t have werewolves and muggle-borns in the real world, it acts a metaphor for real world discrimination such as racism, xenophobia, religious discrimination and homophobia. It’s the people missing the metaphors or think that readers are to stupid to pick analogies to the real world from JKR's world that seem to be the biggest complainers.