Ideology is neither good or bad, ideology is just a modelling tool. Everyone has one, even if it is not to have one.
I have hear politicians deride anyone with an ideology, dismissing them all. Not only is this logically flawed, but this is their excuse to sit on the fence and change positions when it suits.
It allows politicians to state that their role is a managing role rather than be proactive, it allows them to be reactive, a lack of vision hurts us all in the end.
While it is true that some ideology's have lead to ruin, that does not mean to say it is the case for all ideology.
Why is it that values and collection of values known as principles are ok, but a collection of principles known as an ideology is somehow inherently bad.
There needs to be a distinction between ideologies that are violent and those that are not violent.
The united Kingdom has been spared most of the 'isms
The main reason for this is the strong sense of individual liberty in the culture.