A lot of the JW beliefs are sensible and are not necessarily invented by theWT.
Blood: If I am going to have an operation I will definitely so something to have some blood (mine or some comparable match) so that I am less apt to get some desease from a transfusion should it be required. In emergency cases, the most available, compatible donor is acceptable to save a life. Red Cross blood is acceptable.
Beliefs: All belief systems on this planet were invented by man. As man is not infallible the written word that is accepted by all the religious groups, including JW, are not completely reliable. Without a doubt, there are indeed many words of wisdom in the Bibles, Koran etc which can and should be applied living in a society. JWs and many other religions follow the Theocratic War Doctrine of accepting lieing under certain circumsstances is unacceptable.
God's Word: Having a group of people to determine what is the intent of God's word as it is written in the Holy Book has a double whammy. First, I doubt if God came down at election time to determine who should speak for him and how do we know that this book has anything to do with God? This practice of shunning in the JW Cult would not be acceptable to the God I speak of.
War: Most people on this planet are not in favor of war. There is no doubt that there has been wars started by a misunderstanding by fallible human beings. The Iraq war was borderline. I for one agreed with stopping Saddam because there was enough evidence to justify stopping him before he became unstoppable. If these tyrants were let go to do as they wished this world would be ruled by tyrants. Would that be better? The first people to be affected would be JWs and the like. Notice that htere are more JWs in the "free" countries of the world than in the others. Can you emagine JWs in Saudi Arabia?