but, I found a description that tells me why they are so scary - they're Democrats!
The resulting creatures are a powerful race bent on universal conquest and domination, utterly without pity, compassion or remorse. Various storylines portray them as having had every emotion removed except hate, leaving them with a desire to purge the Universe of all non-Dalek life. Very occasionally they are shown as experiencing other emotions, including fear, although such occurrences are rare.Collectively they are the greatest extraterrestrial enemies of the Time Lord and series protagonist, the Doctor. Their famous catchphrase is "Exterminate!", with each syllable individually screeched in a frantic electronic voice.
How did you find them scary? They can’t navigate steps!
They are like Statists! LOL...