Bahá’u’lláh “indicates the true source of kingship”

I can do no better than quote some of Bahá’u’lláh’s Own testimonies, leaving the reader to shape his own judgment as to the falsity of such a deduction. In His “Epistle to the Son of the Wolf” He indicates the true source of kingship: “Regard for the rank of sovereigns is divinely ordained, as is clearly attested by the words of the Prophets of God and His chosen ones. He Who is the Spirit [Jesus]—may peace be upon Him—was asked: ‘O Spirit of God! Is it lawful to give tribute to Caesar, or not?’ And He made reply: ‘Yea, render to Caesar the things that are Caesar’s, and to God the things that are God’s.’ He forbade it not. These two sayings are, in the estimation of men of insight, one and the same, for if that which belonged to Caesar had not come from God He would have forbidden it. And likewise in the sacred verse: ‘Obey God and obey the Apostle, and those among you invested with authority.’ By ‘those invested with authority’ is meant primarily and more specially the Imáms—the blessings of God rest upon them. They verily are the manifestations of the power of God and the sources of His authority, and the repositories of His knowledge, and the daysprings of His commandments. Secondarily these words refer unto the kings and rulers—those through the brightness of whose justice the horizons of the world are resplendent and luminous.” 

- Shoghi Effendi (‘The Promised Day Is Come’)

The “principle of kingship is eulogized” by Bahá’u’lláh and “the rank and conduct of just and fair-minded kings is extolled”

Let none, however, mistake or unwittingly misrepresent the purpose of Bahá’u’lláh. Severe as has been His condemnation pronounced against those sovereigns who persecuted Him, and however strict the censure expressed collectively against those who failed signally in their clear duty to investigate the truth of His Faith and to restrain the hand of the wrongdoer, His teachings embody no principle that can, in any way, be construed as a repudiation, or even a disparagement, however veiled, of the institution of kingship. The catastrophic fall, and the extinction of the dynasties and empires of those monarchs whose disastrous end He particularly prophesied, and the declining fortunes of the sovereigns of His Own generation, whom He generally reproved—both constituting a passing phase of the evolution of the Faith—should, in no wise, be confounded with the future position of that institution. Indeed if we delve into the writings of the Author of the Bahá’í Faith, we cannot fail to discover unnumbered passages in which, in terms that none can misrepresent, the principle of kingship is eulogized, the rank and conduct of just and fair-minded kings is extolled, the rise of monarchs, ruling with justice and even professing His Faith, is envisaged, and the solemn duty to arise and ensure the triumph of Bahá’í sovereigns is inculcated. To conclude from the above quoted words, addressed by Bahá’u’lláh to the monarchs of the earth, to infer from the recital of the woeful disasters that have overtaken so many of them, that His followers either advocate or anticipate the definite extinction of the institution of kingship, would indeed be tantamount to a distortion of His teaching. 

- Shoghi Effendi (‘The Promised Day Is Come’)