An example of a Free Ideology is Sharism.
Ideologies often have very basic concepts. They are very much related to religions. They start with an underlying understanding of human nature. From there most ideologies also create a "state of being" how things used to be, how things currently are and what should be done to move towards the "ideal state" of being.
The believe-systems of ideologies are often very rigid. They can therefore be very dangerous and limit other ideas. They are often also exclusive.
Believers in certain ideologies are often very culty.