He greatly admired German air power. He went over and hobnobbed with the Nazi bigwigs.
When the japs bombed Pearl, he was on Roosevelt’s case to take him back into the Air Corps. Roosevelt refused, so he get some gig as a “technical consultant” and flew around the Pacific to make it seem as if he were some kind of ace.
His heroics were over after Paris.
Not exactly. Before the ambush that killed Yamamoto, Lindbergh had worked with engineers at Lockheed working out carburetor and throttle settings and altitude regimes for long range flights in the P-38. The length of the mission exceeded to official capability of Lightning. Then we went to South Pacific and personally worked with and trained the pilots who carried out the mission, participating in test and training flights in a combat zone. Flights during which he reported shot down a couple of Zeros. The pilots greatly appreciated Lindbergh's expertise and the benefit of his experience.