Once again, you are not understanding my meaning at all. By pretending that nothing happened on that spot, you are in fact, "forgetting". I say, acknowledge the fact that something happened there, the palace was occupied by the Germans, they had set up a graveyard in front of the palace where they buried their dead, etc. It is part of the history of Pushkin and part of Russian history. Why ignore that and pretend that nothing happened there and that the flower bed is just a flower bed? Again: "acknowledge" does not equal "honor" or "forgive and forget", you are totally misunderstanding the meaning if this.
To me, ignoring historical facts (not acknowledging them) is, to a much lesser degree of course, analoguos to planting a lovely garden where the death camps used to stand and pretending nothing happened there. By keeping artifacts from these camps , thus acknowledging they existed - instead of ignoring them - we are not "honoring" these death camps, we are confronting history, and in fact, as much as is in our power, hoping we will learn from history... The fact that the Germans occupied Pushkin and their graves are still beneath the ground in front of the AP is part of the palace's, the town's and the country's history, and has to be acknowledged rather than ignored. History should never be ignored or rewritten, no matter how unpleasant.