Neb. Rev. Stat. § 23-414

No employee or person desiring to be an employee in an office governed by the County Civil Service Commission Act shall be appointed, demoted, discharged, or in any way favored or discriminated against, because of political, racial, or religious opinions or affiliations, but advocating or being a member of a political party or organization that advocates the overthrow of the government of the United States or of this state by force or violence shall be sufficient reason to discharge an employee.