I think Lindbergh was basically a geek who was in way over his head on politics. He was an early case of “shut up and sing.” Hitler used him and his reputation was permanently tarnished if not ruined.
You're being pretty charitable. Lindbergh was very vocal in his political views, which were very much to the liking of the America Firsters as well as Mr. Hitler. Consider this speech, from 9/11 1941. (There are others ... I just grabbed the first one I found.)
Given the circumstances at that late date, Lindbergh's views can't be viewed as anything less than ... well, today they're the same sortof spew that Pat Buchanan and Daily Kos put forth.
The best face one can put on Lindbergh's activities is that he liked attention, and he assumed that his knowledge of flying was sufficient to give him authority on political topics. That, too, is not an uncommon phenomenon today -- I think of Cindy Sheehan, who apparently believes that her son's death gives her political abilities that are unavailable to the rest of us.