What do you call a person who is regionally unbiased and has reasonable love/like for all people from other regions and countries/world? Something like someone who loves all people, not just of his own state within a country. a loyal and disinterested supporter of all countries. Very obsessed with the whole world in a positive way.
cosmopolitan - both noun and adjective
cosmopolite - noun
1. belonging to all the world; not limited to the politics, interests, or prejudices of one part of the world.
4. a person who is free from local, provincial, or national bias or attachment; citizen of the world; cosmopolite.
Random House Kernerman Webster's College Dictionary
1. free from local, provincial, or national ideas, prejudices, or attachments; at home all over the world.
2. of or characteristic of a cosmopolite. noun
5.a person who is free from local, provincial, or national bias or attachment; citizen of the world; cosmopolite.
"Cosmopolitanism is the ideology that all human beings belong to a single community, based on a shared morality."
"Contemporary usage defines the term as 'citizen of the world'."
From what I've seen it may be related to global or world citizen:
In general, a world citizen is a person who places global citizenship above any nationalistic or local identities and relationships.
Albert Einstein described himself as a world citizen and supported the idea throughout his life, famously saying "Nationalism is an infantile disease. It is the measles of mankind."