BCK:
"Would the world be a better place if everybody was a JW? Honestly, yes. At least they are non-violent. And against warfare. Ask the people in Afganistan and Irac if they like war. I don't think it matters if you like JWs or not, it would be better if everybody had the same belief system."
Welcome to the board, BCK. Please don't be offended if I'm blunt. Before I respond, let me ask you. How long were you a witness and how old are you (approximately)?
As for your statement that they are non violent you are obviously not familiar with them or have a handle on history or psychological and social realities in general. The Watchtower itself has said that Jehovah's Witnesses ARE NOT PACIFISTS because they are preaching the greatest war ever. They have said that if God ordered them to fight at Armageddon they would. The reason they do not fight in wars right now is because of their doctrine of neutrality. This is not their kingdom, so fighting in any nation's war is like an Argentinean fighting for the Chinese.
Even without knowing that, a little bit of psychology, history, and common sense should allow one to expect that Jehovah's Witnesses-being totalitarian in nature-would become tyrannical if they had the opportunity to carve out a piece of sovereign territory.
Having the same belief system did not better the world throughout Catholic dominated Medieval Europe. Quite the contrary, certain people were aching to break free of the tyrannical yoke of the Catholic Church. They were known as Protestants and there were lots of bloody wars between the two.