neo-isolationist
/ˌniːəʊˌʌɪsəˈleɪʃ(ə)nɪst/ /ˌniːəʊˌʌɪsəˈleɪʃənɪst/noun
A person who supports or advocates a renewed or revived isolationism.
adjective
Characterized by or supporting neo-isolationism.
Origin
1950s; earliest use found in The New York Times. From neo- + isolationist.