It is fashionable always to cast aspersion upon those that defend persons accused of committing crimes. The viler the accused crime, the more vigorous defense the accused needs, yet, at the same time, the more vitriol the defense attorney will face. I cannot speak for my brethren in the legal community, I can only state that what follows is my own brand of patriotism; I defend those charged with crimes because it is both my duty as a lawyer and as an American. Each piece of resistance to the encroachment of overreaching governmental power is, in and of itself, a victory for freedom.
As stated in "On the Defense of Criminals" an essay by jay Leiderman http://jayleiderman.com/blog/on-the-defense-of-criminals-an-essay-by-jay-leiderman/