Does the Church of Christ Think They Are the Only Ones Going to Heaven?

One of the strangest comments that I have consistently heard since I became a preacher for the church of Christ is "Oh, you think you're the only ones who are going to be saved". I say it's a strange comment because not only do I not believe that and have certainly never preached that sentiment, I do not recall ever having heard it preached or taught in my 64-year association with the church of Christ. Further, since it is forbidden that anyone render a judgement concerning someone else's eternal salvation or loss, it would be an absolute abomination for anyone to be teaching such a concept. So, what is the source of these accusations, and what should our response to them be?