There was a time in my life when I would study this kind of stuff to the early hours of the morning. Mostly about how the bible was wrong, or mistranslated, or the most accurate bible translation etc etc. There is no end to it and it will literally fry your brain if you let if.
An author I found interesting was Daniel B Wallace and he focuses more on 98% of the bible was is the same instead of the 2% that is different. Once you start to think of the bible in terms of context and probability from a mathematical point of view, mainstream Christian beliefs are pretty much what the bible teaches.
JWs are really trying to disprove the bible. Pay them no mind. Same with this wonderment poster. He is a bible burnout who has fried his brain.