Rational normal human beings look at Nazi Germany, PolPot's Cambodia, Stalin's Ussr and are horrified, sickened and appalled by mass murders inflicted on the citizens by these governments. Democrats look at these horrors and get aroused by the wonderful power that those governments wielded over the serfs. For a Democrat there is no such thing as government excess and no such thing as enough power.
For those of you who thought "It can't happen here" It's happening here.