That's awful! I'm honestly surprised by how many people don't have that extroverted skill of getting to know new people. Even at my church, full of well meaning and welcoming Christians who are very loving, they seem to freeze up after the greetings are done. They can't think of anything new to say even when there are countless events going on that they could invite someone to. But it's honestly something that we can change! Those of us who have experienced the lack of a warm welcome at churches have a lot to offer as greeters. Even if it's not our official position.