My question slightly rephrased...
What gave the fed gov the right to that land in the first place?
The uses for land that the fed gov can legally own are limited.
Do you really believe that the FF allowed a setup that would give the fed gov the legal right to take whatever land it wished for whatever purpose it wanted?
The fed gov is limited only to what The Constitution gives it power. Land ownership for reasons other than listed in The Constitution is not within the fed gov’s power in any legal manner.
Keep in mind that Constitutional restraints didn’t just start coming under concerted attack in the ‘60s. This is a problem with history damned near as long as The Constitution’s existence.
To take it? Absolutely not. To buy it from another country? Yes.