Information makes up our minds, our world, Without knowledge we would only be a plant, we wouldn't have the notion to care.
it took many years on the earth for people to realize this as a powerful, weapon. To destroy not physical. but mental power to fight. As brave as one may be, they wont fight if they don't see a threat.
In the same way, people will fight if they think there is a threat, even if the threat is the power they are fighting for.
A mind at the begging of its existence, knows nothing. It is only common knowledge that good is good, if that is taught . Good is taught far more then evil is taught, making the world have an understanding of what good is. Good is also good because in general it strives to create, mixed ideas of what creation is results in some forms of hate.

If evil is taught in a beginning, one has no sense but to use and express this.
Information, In a simplified definition, could be described as the force that makes people perform actions. Information is knowledge, and can may become an even more powerful weapon.
War is a struggle to make people do what you want them to do.
Information, is what makes people believe things and do things.
weapons are generally used in wars
And information in a sense, is a violent, passive aggresive weapon