you’re using the term monroe doctrine pretty willy-nilly. it was a doctrine opposing imperial powers that weren’t america influencing latin america not to assist other imperial powers to divide up latin america. even still what does a treaty written up by the spanish empire have to do with whether or not venezuela is justified in starting a war. that’s like definitionally an imperialist war between venezuela and guyana. if americans had a referendum to annex canada to oppose british imperialism i’d also question the socialistic nature of that too