Science or religion does not outright cause wars. Humans do. Religion is used as a very bad and misunderstood excuse to conduct war, and research into weaponry and technically speaking, science, is a result of warfare. If you look at history, periods of war have sparked many discoveries within science. Take for example Florence Nightingale, a nurse who revolutionized the art of taking care of wounded with respect to hygiene, is a result of the crimean war. The V-2 rocket revenge weapon during WWII by the Germans resulted to become the predecessor of the space race during the cold war. Science helps us achieve our goals, whether they're malicious or peaceful, I wouldn't say science is a cause of war in itself.
I think it's important that people understand that we all have different opinions, and that there will always be conflicts as long as we disagree with each other. Whether it be moral questions, or ways to reach our goal. Buddhism promotes peace and tranquility, that are efficient values. However, I would like to point out that Christianity, Islam etc, other major religions, also promote such values. Some people interpret their religion is a rather far fetched manner though... for example the line in the bible that says "Thou shalt not lie with mankind, as with womankind: it is an abomination." makes some people believe that it condemns homosexuality. Now I know it's up to each individual to interpret this line in their own mind, but I think such things should be personal, not forced onto others.
I would like to express to Dalai Lama on the situation of Tibet. Much hatred has been directed at China due to the current situation. And while I can understand that what the authorities do can be inefficient and morally "wrong" (we all have different thoughts on right and wrong), I think some focus should be directed at the tibetans themselves. Last time I visited the area, I saw disturbing things. While tourists showed little respect for the great artwork of the Potala Palace (whom's now closed), I found tibetans not to be the "peaceful people" portrayed in the media. I saw a dispute between an elderly monk and apparently a tourist where the result was the elderly monk hitting the astonished tourist and shoving him out of the temple. I also saw a dispute between a Chinese driver and a tibetan driver who got into a row about who touched the other's car first that resulted in damage on the two cars. A crowd gathered around them to see the tibetan call for his friend and beat the chinese down until he was lying bleeding on his car hood while the perpetrators fled the scene. While I did want to help him out somehow, my relatives told me to stay out of it due to how the Chinese police can work.
There are other bright sides of course. I've met many friendly monks who gladly tried to communicate with me, telling me about their lifestyles etc, and I would like to tell people that while there will always be violent, disrespectful and arrogant people, there are always other ones who have a kind heart that are willing to lend a helping hand.
So please do not label China as the evil nation and Tibet as the good separatists, because it's very very narrow sighted to look on situations as black and white.
I express my greatest sympathies to people who have suffered under Chinese rule, and also to the han-Chinese population in Tibet that have suffered from violence acted on them due to their country of origin.