patrioteer
/ˌpatrɪəˈtɪə/ /ˌpeɪtrɪəˈtɪə/US depreciative
noun
A person who makes a public display of patriotism, especially for the sake of personal profit or advantage; a person whose patriotism is insincere.
Origin
Early 20th century; earliest use found in The New York Times. From patriot + -eer. Compare French patriotard.