Quote: i'm also concerned that i will properly explain how I arrived at the conclusion i've come to to one group, (maybe my sister/her husband) but not to my parents or another group. and that would be the worst feeling, I'd rather do it where everyone can hear everything i'm saying and try my best not to allow the conversation to be derailed.
Group dynamics suggests that you will quickly lose control of such a situation. Within 30 seconds it will be you against them.
Instead of provoking a family jihad why not just gradually lose interest. Life is complex enough without wasting time on silly superstitions. Find better things to do than waste time with churches and religious foolery. My experience with xtians is that they will tolerate all sorts of un-xtian behavior as long as you don't announce that you have gone over to the other side.
They will perceive your rejection of their bullshit as a rejection of them. And they will react accordingly.