Why would denmark have anything to say? they are in Greenland and no country is claiming them.
Greenland is a part of the Commonwealth of Denmark. If you do some research into the original agreements (or knew those involved) you would know that in return for giving permission to salvage the aircraft in the ice sheet, the Danish government was promised a museum worthy display P-38 in return for allowing the expedition access to ice sheet. As is widely known now, the original attempts to find the aircraft ate up tremendous sums of money and caused great friction amongst the original group. I am not going to get involved in the arguments and strife surrounding the final settlement of the recovery and subsequent restoration efforts. Suffice it to say, Mr. Schoffner put a great amount of money into that restoration and recovery effort and a likeness of an early P-38 is flying now.
The final issue remains that the expedition and recovery team promised a P-38 to the Danish government for museum display, and it never happened. Now, if you were the Danish government, would you play that same game twice?