anti-nationalist

adjective

an·​ti-na·​tion·​al·​ist ˌan-tē-ˈnash-nə-list 

-ˈna-shə-nə-list,

ˌan-tī-

variants or less commonly antinationalist

: opposed to nationalism or to a nationalist movement or government

… they have publicly declared their anti-nationalist, anti-war and individual standpoint …

—Dubravka Ugresic

anti-nationalist noun

or less commonly antinationalist

This is why anti-nationalists cannot see anything good in the nation-state and customarily understand nationalism as ethnic hatred, xenophobia, anti-Semitism and other equally abominable phenomena.

—T. Mastnak

Word History

First Known Use

1863, in the meaning defined above