Without knowledge of God's laws, they tell us, we are lost in a moral fog and lack the ability to discern good from evil. Certainly, the Christian point of view is that God has set standards, however, those standards are universally recognized as being individually unattainable. That is the reason for the necessity of union with God, concerning the human achievement of those divine standards. The vast majority of Christians throughout history have seen behavior as crucial, either to salvation or as an indicator of prior salvation. This makes sense considering that other people cannot know what is going on in your own mind, and they need some way to discern the true from the false among them.
Nobody can compare known humans to any 'perfect' specimen.
To take our fallibility as evidence that we are inherently wicked is to stretch beyond what we can verify. Whether or not they are attainable, is a matter of record, to be sure. Certainly, after 25 thousand years, or more, of human societal coexistance, it is without argument that human beings, generally, are inherently short sighted, self possessed entities, who are individually capable of, and inclined to embody and variously demonstrate every aspect of evil which we have come to describe as such in our vocabulary. Having done this, it is easy to point to any number of atrocities that have been committed in a smug attempt to prove your case. Otherwise, you do not speak for all of humanity, and all you have are examples of the behavior of some of humanity.