1. Offended no. I'll think you're rather rude, the same as if I wrote $manifestDestiny = false. If you know someone you can have banter with them.
2. IT has all sorts of articles of faith. vi versus emacs, I'm weird as I like nano. Religion is a way of living your life, my code is in no way affected by it. How I interact with my colleagues is, for instance I'd hope that having a nice easy rationale for being a good person makes me a decent co-worker. I'd rather not work with a hedonist who doesn't give a fig for anything other than their own happiness, and with the internet we're exposed to plenty of those.
3. I don't view evolution, the big bang etc as contradicting my religious views. Genesis has been viewed as a metaphor since the 4th century BC. Creationism and biblical literalism are relatively recent "innovations" in some Christian traditions. It isn't about the "God of the gaps", it is about science revealing more of the complex creation we inhabit whilst being incapable of answering what the prime first mover was. That said science only shows us what we can measure from the construct of our own perspective. It cannot, and does not claim to be able, to answer everything.
4. Being a member of the Church of England you have to be pretty aware of the historical context of religion! I'm not a biblical literalist and my church is not solely guided by what is in the bible. One of the reasons theology exists is to take all that knowledge and use that context to look at what we can actually divine from the bible.
Being religious doesn't make you automatically not a jerk. Neither does being "scientific" provide an alternative, science isn't a set of ethics. Up until the 1970s academic philosophy was viciously atheist (the only thing worse than a theist was an agnostic). However since then theism has enjoyed a resurgence and disciplines like epistemology have taken on the challenges raised by atheist philosophers.
As a counter-point let me ask a non-religious person, what makes an act good? Be wary of associating it with something which makes you feel "warm and fuzzy" about having done it, because then would you expect someone who did not get that same feeling to do it.