First of all I know JWs very good. I have seen with my own eyes how much they hate people and how much they are jealous. So since I am DFed I knew they will use every opportunity to insult me if they will see me. Secondly brothers and sisters who know me know that there is no point to argue with me as I have good knowledge of the Bible.
As JWs we were taught to quietly look down on non-JWs and put down any accomplishments they may achieve. Everything in this system is just not good enough for a JW, except the organization, whatever they do is perfect and good. Sometimes I think people are even more jealous of faders and inactive ones because they aren't following the rules (field service, meetings, prayer) but haven't been punished. Secretly many JWs would love to skip those things themselves but don't have the will to do so.