Excerpt from this short essay on Arendts thesis on The Banality of Evil:
The big lesson of her thesis, I think, is this: If Evil comes calling, do not expect it to be stupid enough to advertise itself as such. It’s far more likely that it will look like your favorite uncle or your sweet grandmother. It just might cloak itself in grandiloquent platitudes like “equality,” “social justice” and some itereation of a "Geater common good.” It could even be a prominent member of Parliament or Congress.
"Error never shows itself in its naked reality, in order to be discovered. On the contrary, it dresses elegantly, so that the unwary may be led to believe that it is more truthful than truth itself." - St Irenaeus