Shrieking of the mad

Someone always calls me in my nightmare
The voice of salvation
Behind these blind walls of rain
The bony trees stand black
And point their fingers in every direction
It's a wisdom gone insane
Lying numb to the beats of machine guns
Spitting out rounds of a terrifying song
Kept awake by a rapist on the stairway
By the shrieking of the mad
Always in the company of bad men
Once again in a storm of steel
Will this be the cleansing of my soul
or the revelation of a pig's fat heart?
Fanatics call me in my nightmare
Voices of salvation