Does Staples use logic, emotion, or a combination of the two to appeal to his readers? How appropriate is his strategy?
Staples makes his point both with logic and emotion. He describes the feelings of his "victims" as well as his own He describes himself as a "softy who is scarcely able to take a knife to a raw chicken"; this image combined with that of the fear he describes many feeling for him urges the reader to have sympathy for Staples.
He uses logic when he speaks about the history of such attitudes, specifically when he cites Podhoretz's article. He speaks both about the prevalence of these fears as well as what factors go into a young man "becoming a thug" in a very measured and thoughtful manner.
His strategy works well; he clearly has strong feelings on the problem, but shows these feelings in a well-thought-out manner.