This is not a very loving response to the statement. I myself do not worship with instruments - but if you think Christianity is about hurting other people with sarcasm then you as well should re-read the Gospel message. Christ died so that we may love others...encourage them. If you disagree, do it in love. I refer you to Romans 14. You may not like what I have to say or this person who sees instruments as "okay", but you love the person anyway!