Another clue may come from the meaning of the name Zerubbabel: The name Zerubbabel consists of two parts. The second part of this name is obviously the same as the Hebrew word for Babel / Babylon. The origin of the first part is a bit of a mystery.
Insubordination is generally a punishable offense in hierarchical organizations which depend on people lower in the chain of command doing what they are expected to do.
According to Lloyd Duhaime, a lawyer from the lawyer training center Duhaime.org, in 'Garvin v Chambers,' a California case, insubordination was defined as refusal to obey some order which a superior officer is entitled to give and is entitled to have obeyed..