Could an obsession with correcting others stem from a habit of defending a religion?

I grew up in a very strict religious household. Somewhere along the line, I remember learning that as a Christian, it was important that I stand up for God. This resulted in me feeling that if anyone said anything I considered “wrong” about God, it was my job to “correct” him or her. It was my job to “set that person straight” and not let anyone “lie” about God and “ruin” his “perfect” reputation. This became a habit. In my teen years, I wanted to get away from this religion, to start over, and make sure I knew I believed in what I believed in because I believed in it, not ‘cause my parents did. I have been told that my correcting other people is annoying. Before today, I don’t remember making this connection before—that my correcting others might have to do with an earlier habit. Is it possible that such a habit would result in this? Feeling the need to defend myself when I feel misunderstood? Or when I feel somebody else is being unfairly treated? Could this be why I am so obsessed with correcting others when I am and with making sure they see things exactly how I feel they are meant when I get that way? How can I tell when it’s time for me to walk away? What can help me not be so defensive in the future?