I disagree with the green tea is against the word of wisdom theory. It is black tea, hot or cold, that's it. Anything beyond black tea is just speculation, and you should use your judgment. Who knows why black tea is banned? Don't know, but it could be fermentation. The use of grains is encouraged, unless fermented and turned into alcohol. Yes, green tea is the leaves of the tea plant, but every other herbal tea that I know of is also made of the leaves of the plant. Besides, when has anything that is good for you been restricted? You want to avoid harmful substances, stay away from anything made by Hostess.
So I say, go ahead and drink your green tea.