To the terrorists:

"Once freedom has exploded in the soul of man,
the gods no longer have any power over him"

Jean-Paul SARTRE
Existentialism is a Humanism (1945)

To the protesters (their supporters):

"If merely 'feeling good' could decide,
drunkenness would be the supremely valid human experience".

William JAMES
Varieties of Religious Experience (1902)

Beware lest you lose the substance by grasping at the shadow. ~Aesop