While I agree that the terms "born again" and "saved" do reflect actual statements in the Bible, I still think the pastor/minister was rude.
The first thing he wanted to know was if the OP was Christian. The OP answered that yes, he was, and that his pastor had already been by to visit. This shows that not only is the OP Christian, he is also very likely having his spiritual needs met.
So if the terms "born again" and "saved" are associated with all Christians, the pastor/minister received the answer as soon as the OP said "I am Christian." That he asked about those two things specifically very strongly implies that he doesn't think they are associated with all Christians - only with some. Since he also strongly implied that the religions associated with these terms are better than those that are not...he was rude.