Under totalitarianism, how does ideology come into being?

Many people think it is a group of crazy individuals who create extreme ideas.
But the real issue is: the disconnect between people and the real world.
When a person no longer belongs to any community, no longer trusts human relationships, no longer believes in experience, facts, or the future,
they will begin to crave a "solution that explains everything."
But there is a type of person here who is easily misunderstood: the so-called "sober-minded."
Truly sober-minded people do not easily fall into extreme ideologies.
Because they still retain perception of reality, the capacity to bear complexity, and a stable self-structure.
The ones truly at risk of being engulfed are those who have lost both connection to reality and internal support.
The greatest temptation of ideology is never correctness, but certainty.
It compresses the complex world into a single logic:
All problems have enemies, all chaos has causes, all suffering has explanations, all history has direction.
Thus, people no longer understand the world through reality, but through theory.
Eventually, it even develops into: if reality does not conform to theory, then it is not the theory that is wrong, but reality.
Totalitarianism relies not on mad people, but on those who have lost their sense of reality.