Complicity. What is it?

I have had several disagreements about the duty of the court to honor their oath to defend the Constitution. Complicity is very easy to see. If you have a duty or a responsibility to do something and you don't then you are complicit. I am amazed at how many people say I am right but do not want to get involved. Why is that do you think? If you are an American you have a duty to stand up for the Constitution. Give me some help here. Why do you think a person would say I am right and not get involved?