The memorial structures and parks in Washington D.C. and elsewhere belong to the people, not to the government. The WW-II memorial celebrates the accomplishments of the soldiers who fought the war and the current government can’t take any credit, whatsoever, for that.
The behavior of the Obama administration, Harry Reid and his Democrat thugs in closing off these parks and monuments is at best shameful and at worst a disgrace. They have no right at all to do this. So why to they do it? They do it because a) they can, and b) because they think their political opponents will be blamed. That’s about as low as you can get, even in by Washington standards.