|A memorial to the victims in Sandy Hook, CT|
I cannot imagine any person - at least, one who seriously describes himself as a Christian - answering either question in the affirmative.
Rather, man's total depravity is taught all through Scripture. That is not teaching that men, or any particular man, are as wicked as we could be - though I admit that I wonder sometimes, such as after the Sandy Hook massacre. Rather, it is the teaching that every faculty, whether physical, mental, or spiritual, of every man is corrupted by the effects of sin.
While I have cited many passages on this issue (use the "total depravity" tag at the bottom), I want to add one that is rarely considered, Titus 3:3: "We ourselves were once foolish, disobedient, led astray, slaves to various passions and pleasures, passing our days in malice and envy, hated by others and hating one another." A key element in this verse is that Paul uses the past tense. He describes the nature that Christians had before our conversion. And he does not paint a pretty picture, certainly nothing that should be a basis for self-esteem!
What changes a person is not increased self-esteem, or social reform, or any of the other progressive psycho-babble proposals that are so popular these days. Rather, the solution is regeneration, that change of a man's heart by which the Holy Spirit gives him a new nature, not free from sin in this life, but free from the dominion of sin: "I [God] will give you a new heart, and a new spirit I will put within you. And I will remove the heart of stone from your flesh and give you a heart of flesh. And I will put My Spirit within you, and cause you to walk in My statutes and be careful to obey My rules" (Ezekiel 36:26-27).
The problem with the corrupt Christianity preached by Joel Osteen, Robert Schuller, etc., is that they try to hush up what Scripture says about sin and its consequences. Yet, that attitude is contrary to Scripture, such as Paul's comment to Titus cited above. But the question must then be asked of them, How can a man believe the good news of salvation if he doesn't first hear the bad news of the sinful condition from which he must be saved? Imagine the doctor who tries to convince a patient to undergo surgery if he hasn't first told him of the tumor that threatens his life. What would the reaction of the patient be? I know that I would never submit to surgery without a sufficient cause! In the same way, the unbeliever cannot repent and turn to Christ until he first knows his sinful condition and the eternal death that is its consequence.