We should eschew cynicism, but apply reasonable skepticism broadly:The natural disposition is always to believe. It is acquired wisdom and experience only that teach incredulity, and they very seldom teach it enough. The wisest and most cautious of us all frequently gives credit to stories which he himself is afterwards both ashamed and astonished that he could possibly think of believing.One reason to reject cynicism is that cynicism is an antonym for “faith” - and “without faith it is impossible to please God.”The man whom we believe is necessarily, in the things concerning which we believe him, our leader and director, and we look up to him with a certain degree of esteem and respect. But as from admiring other people we come to wish to be admired ourselves; so from being led and directed by other people we learn to wish to become ourselves leaders and directors . . .
The desire of being believed, the desire of persuading, of leading and directing other people, seems to be one of the strongest of all our natural desires. - Adam Smith, Theory of Moral Sentiments (1759)
Another reason to reject cynicism, IMHO, is that cynicism actually is a rejection of skepticism about the opposite of whatever you are cynical about. Are you, Mr. journalist, cynical about Judge Roy Moore? Then you are actually naive about his accusers. Are you, Mr. socialist, cynical about society? Then you are naive about government.
The Left has more than a half century of cynicism of our goverment not because of perceived wrongs but because it is not Socialist/Communist. They are downright hostile to the established form of government in this country and our constitution and the rights it identifies.