As Christ followers we need to aggressively live in love and humbly stand for the truth. It's possible for us to be right and wrong in how we express it and defend it. But, it's also possible for us to have experienced salvation and not know how to explain what anchors our faith.
If I want to torpedo Christianity, I'm going to start with the Bible. If it's not true, then nothing we cling to is worthy of our faith.