I agree with all the comments saying "change" or "delete". But quite often I find myself saying all the things that you wrote and coloring it with four letter words. I have "preached" this way to two of my JW brothers and an two elders for three years. They are still attending meetings, conventions and preaching, as much as they did before. Only time will tell if I made a dent in their beliefs. However, there's a better way, I think, the gentle, subtle way to persuade works more effectively. It allows for discussion to continue. Your way (my way too) ends the process quite abruptly.
Define clearly your objective. Is it to unload your anger on a believer, or hurt the Watchtower by pulling away its most valued resources, your sister and 8 million other innocent humans. I'd go for the latter.