By all means, offend if need be. I'd rather be offended than not take an interest.
But if you're concerned about blaspheming your faith through your writing, I suggest asking your local pastor.
Well,
that seems to approach it both wisely and with caring about the writer's sincere feelings and concerns!
We all probably worry about what sorts of energy we put out into the Universe, are we saying something ultimately "positive" or "negative" with our creativity and hard work?
Scripture speaks of not becoming a stumbling block to others' faith ... and yet isn't there also the obligation to help others mature in their faith?
To fear to ASK THE QUESTION (or to offer our readers a challenge to ask an important question) ... does that mean we FEAR that God cannot have an ANSWER ??? I doubt there is any question that Man can ask that the Divine cannot answer ...
Certainly, Jesus said and taught Truths which gave 'offense' to the religious leaders of his time ... and we call his challenges to their entrenched dogmas a Greater Truth.
Certainly, Jesus embraced STORY-TELLING and PARABLES as a valid method of teaching REAL TRUTHS ...
Cannot a sincere fiction writing do the same?
Myself, I agree with the comments offered above, that EVIL exists in the world and can be fairly DEPICTED as a way to EXPOSE and COMBAT Evil.
And that needn't be in any mindless or sugar-coated depiction. EVIL seduces ... and (imo) it's valid to communicate that Seductiveness, if depicting it helps the reader OVERCOME or RECOGNIZE it.
People like to
hate on the pedophile scandals of certain religious institutions, or the sexual depravity of this televangelist or that one ...
But we all KNOW that Power corrupts, that Evil tempts and seduces, and man is fallen and weak ... that is SCRIPTURE.
The greatest shame is to hypercritically DENY it or COVER IT UP when we discover it! The disgrace of some is the enlightenment of others!
That said ... there is the Jewish folklore saying I'm fond of:
"We are not guilty if the bird of Temptation flies over our heads or sings into our ears ... But we are guilty should we allow it to build a nest in our beard!"
So, imo ...
Write, and let your conscience guide you: Listen to its warnings but also let it instruct and encourage you to speak the truth and goodness as you understand it!
PS
I loved BUFFY THE VAMPIRE SLAYER. It was a very dramatic and character-rich Fantasy romp, full of humour and thrills and emotional heartache!
Oddly, I can only think of ONE TIME that this show, which had a deep moral core (imo) and dealt with all sorts of "evil" fantasy creatures and human emotional angst, ever mentioned anything about "religion" as Christians would see it:
Buffy said something like "Note to self: Religion Bad."
I was like ... what?! I was disappointed and puzzled. Also, I sort of thought: then WHY, exactly, have crucifixes and holy water been killing your demons for the past SEVEN YEARS or so, again?
We live in secular times, in which good people have been deluded about the bad side of institutional religions.
Correction is due. OVERdue. But it is due from those who can approach the seductions of this world with eyes wide open, not squeezed shut with fear or ignorance or prejudice or self-righteousness.
There is nothing wrong imo with preaching to the fallen by first admitting you understand the falleness personally.