So in that case comics should never portray anything in a negative light as it might upset someone.
Christian beliefs are no more important than other religious beliefs, political beliefs, sexual orientation, gender, musical taste or sock loving.
Except that the reverse conservative political POV is never given the same freedom.
The last story I can recall that was even remotely critical of gays for example, was Jim Shooter's
story in HULK magazine 23.

For which in the letters section, it was clear that Marvel received a targeted backlash from gays for publishing the story. Despite, as Shooter makes clear, that there was a seed of real experience for the story.
I could refer you to several dozen links in the "Canada Allows Same Sex Marriage" topic that, despite that homosexuality cannot even be proven to be a scientific/genetic/natural condition and not just an obsessive disorder, dissent and counterpoint to gay marriage is often not permitted, and dissenters intimidated, fired from jobs, and otherwise silenced.
More to
MY point, I don't mind if a skeptical POV of Christianity is given in a story, but it should be done in a way that presents a respectful counterpoint or dialogue on the subject, as opposed to just being as insulting and deliberately offensive as possible to people of religious faith.