I think that if someone is generally happy with what they believe and it gets them through life then browbeating them and trying to perhaps take away that belief might in many cases be wrong and even cruel.
Cross Reference however I don't mind so much.
We both have a perspective and I don't lie about what I think I know. I've been here a while now and I still have to walk on eggshells regarding what is deemed to be insulting to faith. If YECs claim to know beyond doubt then it really isn't very good to moan when a similar level of certainty is bounced back at you. In my experience most non believers simply don't often claim to be absolutely certain, but say knowing that the age of the universe is measured in billions of years not thousands is something I'm virtually as certain about as makes no difference. I also have as little doubt that Genesis was never even meant to regarded as a literal narrative as makes no difference.
I very much doubt that the Christian God is true but I don't reject the idea of some divine entity, only not one based in an ancient scripture clearly written by people who filled in the gaps in their knowledge with supernatural suppositions.
The same applies to any religious group, if there was only the one religion then I might even be religious myself, that alone would be excellent evidence of something real, but since people have always tended to create their own individual beliefs then I can easily discount them all.
I don't agree that it is being certain about disbelief, that doesn't really make sense to be certain about something negative, for me it's more about being certain that the other guy's beliefs are untrue.
It's those like you who are proclaiming a "truth", it's the positive claim which needs to be scrutinised not a disbelief.
That's not how it seems to me, some people simply require at least some rational evidence based reasoning which is not what seems to be available.
I have no problem with people who believe perhaps by tradition, intuition or just spiritual feeling, but that isn't what science is about, and if you want to trump any inconvenient science with an ancient scripture alone then I think you must expect some flak not to mention disbelief.