W H Auden wrote a poem at the start 0f WWII, "September 1, 1939" (the day the Germans invaded Poland). The last two stanzas (which Auden later dropped from the poem) are

All I have is a voice 
To undo the folded lie,
The romantic lie in the brain
Of the sensual man-in-the-street
And the lie of Authority
Whose buildings grope the sky:
There is no such thing as the State
And no one exists alone;
Hunger allows no choice
To the citizen or the police;
We must love one another or die.

Defenceless under the night
Our world in stupor lies;
Yet, dotted everywhere,
Ironic points of light
Flash out wherever the Just
Exchange their messages:
May I, composed like them
Of Eros and of dust,
Beleaguered by the same
Negation and despair,
Show an affirming flame.

"We must love one another or die." That, to me, is the message of the Gospels.