So what? Did he say anything negative? All I see in your blog pimping is your pissed about him attending at all. Where is your indignation about any US citizen or political offspring visiting Dresden or Hamburg?
With the world growing smaller, the Japanese are not sequestered in any line of thought because they live on an island. Sure you are going to have the anti-nuke goofs no matter where you go but, you also have many starting to see the reality of just how many lives it did save, on both sides.
In his statements, he came a hair’s width from condemning his grandfather. He actively refused to support him.
The fact that he stood with those who want to rewrite history and did not correct them in any way demonstrates that he is at a minimum a political pawn for their ends (which is what the article says).