What reasons did Charles Lindberg use in defending his position?

Five years later, Lindbergh's toddler son was kidnapped and murdered in what many called “the crime of the century.” In the lead-up to World War II, Lindbergh was an outspoken isolationist, opposing American aid to Great Britain in the fight against Nazi Germany. Some accused him of being a Nazi sympathizer.

Explanation:

1. it was caused by feudalism

2. charlemagne used christianity as a major cornerstone for his rule. cloisters were built all over the empire to act as centers for the (re)population of the vast european wilderness.

3. the europeans feared the next raid every time chetak

i'm not so sure about #6. but i hope i you with the first 3.