I agree with Icculus I listen to umphreys mcgee (another secular jamband) and i have no problem with them and my faith, many of their songs show the influence of gods will.
Believe the lie lyrics -
"If you believe in every lie
You're never free to walk away
You should be free to go hell."
Divisions
"Moments of division, lord but I can't see
contemplate my motion, who am I to be.
then it fades, far gone
it's my sin
soul embrace
soul the same
soul embraced
soul the same"
I also love phish...
Silent in the morning
"My glance is always darting, when I stroll the avenue
Avoiding all the obstacles that terrorize my view
If you are here with me, I trust you to lead the way
When youre not I follow you, and always go astray
Silent in the morning
Suspended in the trees
Lunch time comes youve found your voice
It brings me to my knees
The volume just increases
The resounding echoes grow
Till once again I bask in morning stillness, I love so
The target that I shoot for seems to move with every breath
I tighten all my arteries and make one last request
Divine creation hears me, and he squashes me with fear
I think that this exact thing happened to me, just last year"
You see God can be found even in the most unexpected places... it turned me away from the drug life... however it is things like these that did it for me... however i agree the atmosphere is only for the strong Christian who has huge self control to actually go to the shows.