This is another movie that I am very disappointed in how CSM rated it. There is little question that they are right that it is NOT for kids, however, it is a very good movie about love and a call for justice. Granted the methods that the main character uses to display that love in seeking justice are questionable, but sometimes justice comes in ugly packages.
The movie is based upon the business of kidnapping in Mexico. It is a horrible business that is paid up with the right people, and as a result justice is nowhere to be found. At the very least the movie accomplishes at least one honorable thing in it's graphic portrayal, it brings attention to the real life injustice that exists.
(Furthermore, the movie has a lot to say about self sacrifice. The Bible itself says that greater love has no man but this, that a man lays down his life for his friends. (John 15:13) Which is exactly what the main character ultimately does.)
Many people will say that revenge is a big part of what this movie displays, and I can concede that there are elements of it there, but don 't forget the elements of justice and more importantly love which I think are the true messages of Man On Fire.