[Yardstick]

Their foolish utopianism, of having peace without needing to use force to stop evil, impedes our ability to deal with reality. As a result, we are weakened in our ability to confront evil.

Nicely put.

[Springfield45]

"Their foolish utopianism" (warning: Jimmy Carter!)..."of having peace" (oooh! Jimmy Carter in rapture! Danger, Will Robinson!) without needing to use force (Jimmy Carterthink: always go to Detente and give away the store to achieve the "victory of peace") to stop evil".
The only thing I would have added to this description ("foolish utopianism") would have been the words "arrogant, self-righteous, and smug", as in "their foolish, arrogant, smug, self-righteous utopianism." Honestly, the Left considers themselves superior and considers those who disagree with them to be stupid, hicks, Limbaugh Zombies, Religious Fanatics, etc etc etc...