-The origins of racism/discrimination. Tom Riddle (Lord Voldemort) and his origins are a major plotline in the novel. Rowling's theory of discrimination mainly discusses individual racism, while structural racism is what ARC concentrates on eliminating. Also, Rowling emphasizes love as a way to combat intolerance (Dumbledore says this is the reason why Harry isn't like Voldemort)--you can interpret this to mean pluralism is better than purity. Still, it’s important to recognize that while Rowling’s magical world is amazing (who DIDN’T want to go to Hogwarts when they read the books?), it’s still stratified, and faces the same problems of equity and pluralism that our world does.

So what's my take? In my opinion, the Harry Potter series is a classic WWII allegory, just like the Lord of the Rings Trilogy, among other well-known fantasy classics. Just look at the characters:

Hitler, as we all can guess, is Lord Voldemort. Both are leaders of movements for racial purity (Muggle borns vs. Pureblood wizards and purity in the Aryan race). Voldemort, like Hitler, uses terror tactics against Muggles and Muggle borns to achieve his ends. In the seventh book (where most of the allegory really comes out), he begins to advocate policies that strip Muggle borns of their powers, and "Muggle born registers", similar to Hitler’s policies against non-Aryans. The Nazis are the Death Eaters, who revere Voldemort, but are scared of him at the same time. The way Voldemort came to power was gradual, just like the way Hitler came to power, drawing off of misunderstanding and fear to rally support.

Rufus Scrimgeour seems to be Stalin--he tries to fight Voldemort, but is definitely working for his own ends. Of course, there was no secret pact with Voldemort that we know of, sure, but Scrimgeour is not above sinking to Voldemort's level to win the war. He's reluctant to agree with Dumbledore (just like Churchill/FDR and Stalin didn’t see eye to eye), and seems to hope that the Order of the Phoenix (the Allies) will take care of the problem. The Order is also reluctant to espouse Scrimgeour's tactics (much like Churchill's statement that he'd form an alliance with the Devil if that would help him get rid of Hitler)

Chamberlain, of course, is Cornelius Fudge. Appeasement never works when the stakes are high (and your adversary has a huge army and lots of resources).

Churchill is Dumbledore (in my opinion; There's also an FDR argument). Charismatic leader, can see 10 steps ahead of everyone else. People thought that he was an alarmist at first because of his beliefs about the rise of Voldemort/Hitler, but he was spot on. He sticks to his convictions—but we may be giving Churchill too much credit.

FDR, for lack of a better comparison, is Harry. He enters the war late, but in a substantial role after being under Dumbledore/Churchill's guidance for a while; he finally starts to make decisions at the end. Harry is the rallying point for anti-Hitler/Voldemort movement.

Further Reading
Associated Content’s take on themes of race in Harry Potter
Another link on race themes in Harry Potter
For all of you who need a refresher, Sparknotes’ summary of the book.

That’s my take on the series—what do you guys think?