Could you help me, I have a question: who should define how group of persons should be called? * Group that outside of the group * Majority of the group * Minority of the group * Any of the above when they think its for inclusion ?

Nice, you're discovering intersectionality.

Seriously though, you are pressed about other people using a term you don't use even though you're free to say Latino or Hispanic as much as you want.

The context matters immensely: The Sierra Club, a lobbyist group, conducts their work with politicians and government officials who are not pressed by inclusive language.