Honestly, I think the abdication was a clarification for a lot of people (those familiar with the Duke of Windsor's personality....i.e. those who worked for the British government and his family) that David was not the right person to be King.
As previously mentioned, David was extremely popular as Prince of Wales. It was a highly romanticized, dashing Prince who toured the world and the slums and stated that "something must be done." But the fact remains is when the chips where down, he bailed. Yes, the media and time were not fair to David or Wallis but as previously mentioned to Queen Mary, duty was everything. Her devotion to duty affected the relationship she had with her childern. She simply couldn't not understand why to David, it wasn't the same. From her mindset, what I get is this...people have died (British soldiers had died in World War I and were soon to be heavily hit in World War II, to be to make sure that all of Britian was free, for God, King and Country) and all you need to do is give up this woman (when so many have given up their lives) and you can't do that? I am sure she couldn't understand it.
Looking back, in 2009 I am sure many of us simiply don't get it. But 1936 was a very very different time. Heck...in regards to the crowning of George VI there was some concerns that people would be LISTENING TO THE RADIO IN PUBS AND WOULDN"T TAKE OFF THEIR HATS! That's the kind of world 1936 was.
IMO David was just plain spoiled. Yes, its wrong that you can't marry the woman you love. Yes, everyone is being TOTALLY mean to you...if you love her why shouldn't you honor your love with an official confirmation in church letting everyone know this. If he was David Jones, he could have done this but he wasn't. And yes it was wrong that your wife was denied the HRH title but AGAIN its 1936...she had already had two husbands and was on her third. The British establishment had never seen anything like Wallis before.....for all they know she could have married David, been divorced in three years and you got a divorced Duchess running around Europe that you can't control with jewelery that had belong to the Royal Family for years! I am sure to many he simply lost his mind!
You can't come to the party and eat the food (by enjoying the wealth and priviliges of being royal) and when they want you to pay (by doing your duty and providing a heir) you can't complain that you don't like the rules.