1. The body of ideas reflecting the social needs and aspirations of an individual, group, class, or culture. 2. A set of doctrines or beliefs that form the basis of a political, economic, or other system.
Ideology is a body of ideas. The concept of bodies of ideas is not good or evil or a danger. Particular idealogies can be good or evil or dangerous, but ideology is not and cannot be. Capitalism, conservatism, and even Christianity can be construed as ideologies as much as communism, nazism or Islamism. Ideology is not the problem. Particular ideologies are.
There is a certain sense to your answer but you are missing the point I'm trying to make, which is -
Ideas are only useful when they are are based in reality, and ideologies are only valuable if they actually work and produce results.
Therefore, I believe that ALL practitioners of ALL ideologies are out of touch with reality. They confuse the picture of the hamburger on the menu with the actual hamburger.