Jesus is an antidote to a deadly disease. Some people have the symptoms of the disease more obviously or in a greater manner than others. But everybody is sick. The sickness, the Bible says, is sin. The proper way of looking at this is not as a wrinkle in theology, but seeing mankind as desperately ill.
Some people have more symptoms than other people.
They have much more evil behavior symptomatic of their sinful condition. Hitler was one of those. Jonas Salk, on the other hand, though a sinner, didn't have the same symptoms that Hitler had. He had fewer symptoms. In fact, he did great good for everyone.