there is a famous arabic phrase: "No harm will come to the clouds from the barking of the hounds"
oh brothers, certainly backbiting those in authority like the leaders and scholars is not only backbiting those individuals, but it is also back biting and destroying what they stand for regarding their responsibilities. So when people talk bad about the govt or the scholars, the overall status and importance of the scholars diminishes in the eyes of the people. Furthermore,what the scholars may say and advise with from the legislation of Allah then loses its weight.
This in turn results in people not acting accordance with the legislation - all caused by that initial backbiting (fitnah). In that there is a weakening of the religion of Allah among the common people.
so people who speaks badly of those in authority like the nation's leader and the governments,they harm the entire society.They dont harm only the government, but the whole society. This leads to infringement upon the safety and security of society, its stability,and public order. when people dishonor their leaders (kings, presidents,etc) and the governments,their status and reputations are lowered among the common masses. they begin to renounce allegiance to them,stop acting in compliance with what they command,and disregard whatever they may prohibit. At such time, anarchy becomes acceptable to the society,each individual becoming his own leader. Then the affairs of corruption set in and the people live in chaos and disorder having no direction and leadership.
so backbiting (fitnah)is a major sin and not something to be taken lightly. -Imaam Ibn Al Uthaymeen