Remember that Lindberg was pro-Hitler until the chips fell...
I don't know if he ever served in the European Theater but he was made more famous by his time in the Pacific.
[Which, by the way, suggests a racial bias rather than political.]
What the hell, it's no more absurd than any othe the other theories and it does tie into the lady in NH who many claim to have been Earhart.
Would be most interesting to see any statements from the "ex-MI5 agent...", his step-brother, James Hannon [the American officer], et al.
Most noteworthy failure so far is the lack of reports from all those nuns and nurses supposed to have referred to a fellow internee as 'the Yank' or 'female Lindberg'; seems at least one of them would have talked before now.