The more I studied this subject, I am more impressed how much all the denonations of false religion have in common without a central body. The core ideas of Christianity are basically all the same no matter what church you go to.
-Salvation though faith
-Jesus was the manifestion of god in the flesh
Minor differences in dogma really don't matter that much.
What bothers me now is how intellectually lazy the approach JW have toward bible study ( if they really study at all). The unity they always talk about is just laziness combined with building core dogma around the most debatable books of the bible.