Lot’s of good stuff here to munch on.
My hesitancy to flaunt my faith has nothing to do with fear of judgment by non-believers. My mother was an angry, agnostic ex-Baptist; my father is a casual atheist. (I asked him once why he didn’t believe in God, and he replied easily, “Because He doesn’t exist.”)
I am not smart enough to argue with those that cling to disbelief. Centuries of philosophers have made better arguments than I could, and I am comfortable with just pointing in their direction if an acquaintance insists, “If there is a God, then why [insert atrocity]?” For me, belief didn’t come after I had the answer to that question. Belief came when I stopped needing the answer.
No, I’m nervous to come out as a Christian because I worry I’m not good enough of one. I’m not scared that non-believers will make me feel an outcast. I’m scared that Christians will.