Are totalitarian leaders dangerous?

I would say yes, but that is my opinion.

Explanation:

Totalitarianism is a political system or a form of government that prohibits opposition parties, restricts individual opposition to the state and its claims, and exercises an extremely high degree of control over public and private life. It is regarded as the most extreme and complete form of authoritarianism.

As Hannah Arendt explains in The Origins of Totalitarianism, it is, rather, just one ... to bring about your ruin simply because they are in danger