I used to believe that actions could speak louder than words. But alas, JWs are blind as well as deaf. I tried, but after years feel that my actions yielded absolutely no results as JWs are self righteous and no matter how much good you try to do you are still "a worldly" and not worthy to breathe the air, by their standards.
This leads me to the conclusion that whatever changes a JW makes, it must come from within. Maybe some of these people just have that cold hearted self righteous attitude as an innate character make-up and the WT merely strokes that part of their ego. Yes, it all boils down to EGO. Some people have to believe they are better than others and more special to god. The propaganda concerning "worldlies" put out by WT gives the JWs a certain amount of satisfaction in believing they are exclusive and superior over the majority of people in the world. Their door to door "work" is based on the arrogance of "the pretense of knowing "sacred secrets" that others don't" and the manner of their "witnessing" is condescending. The condescention is evidenced by the fact that, as said above, they do not actually "discuss" anything nor will they look at your materials that cause any questions. They are there only to shove their dogma without regard for your questions or for those who have any real thirst for knowledge.
I have finally decided that some of these people, if they go against their conscience long enough, become very hardened. If they lack the gumption to stand up for things that they feel in the heart, they will gradually be changed to have no heart and no conscience. Like others who are "turned over to a reprobate mind" because they refused the truth and bought a lie instead.
It is of their own doing. Sometimes you just have to know you have done all you could and it's time to walk away.