We have many things to be disappointed with the current German politicians about, but this "closing" seems to be blown up out of proportion.
I think that the excellent museum is staying open, this is some other monument. The Checkpoint Charlie museum is excellent. I went for the third time earlier this year-- it is always impressive to see the creativity of the people trying to flee totalitarian rule.
And, the Germans and Austrians have kept a number of the Concentration camps open as a vivid reminder of the Holocaust. I just visited one in Austria- Mauthausen-- that was the last to be liberated by the Americans. They have kept most of the buildings and the Stairs of Death untouched, including the ovens and the gas chamber.
Dachau, Auschwitz, and many more are still there as reminders.
If the museum is staying open, that's good. But I still remember all the "Ami Go Home!" signs that appeared at the end of the Cold War, when the Germans felt like they didn't need us any more. Well, we DID go home, and we took our money with us. I understand that the little German towns that used to make money gouging the Americans would love to have the nasty old Amis (and their money) back. I will really enjoy watching American troops leave Germany for Romania and Bulgaria.