You are entirely wrong.
Man is inherently bad, but it is his relationship to God that keeps him in check. "A moral people do not need a government", Laws are not for the law abiding, or the moral people. Laws are for those that are derelict.
Conservatives believe in People governing themselves and conserve the use of government to those that can not.
"Before any man can be considered as a member of Civil Society, he must be considered as a subject of the Governor of the Universe." --James Madison
"We have this day restored the Sovereign to whom all men ought to be obedient. He reigns in heaven and from the rising to the setting of the sun, let His kingdom come." -- Samuel Adams
"Liberty exists in proportion to wholesome restraint." --Daniel Webster
"Your love of liberty -- your respect for the laws -- your habits of industry -- and your practice of the moral and religious obligations, are the strongest claims to national and individual happiness." --George Washington
"Reading, reflection and time have convinced me that the interests of society require the observation of those moral precepts ... in which all religions agree." --Thomas Jefferson
"It would be peculiarly improper to omit, in this first official act, my fervent supplications to that Almighty Being who rules over the universe." Washington continued: "No people can be bound to acknowledge and adore the Invisible Hand which conducts the affairs of men more than the people of the United States. Every step by which they have advanced to the character of an independent nation seems to have been distinguished by some token of providential agency." --George Washington
Ones belief in a Creator tends to make that person a conservative since modern liberals don't, modern liberal are secular humanists.
Not even fire and brinstone preachers think man is evil, since they feel that souls can be saved. Each of us can be good, and do good, if we choose that path. Happily most of us mostly do choose the path of rightious living, ergo man is mostly good.