If Guidestar doesn’t have the information you need, know that the 990 filing of a charity must be made available to the public in some way. It is legitimate to make it available on request only. They may also be providing other information.
The 990 is a tax return and not exactly designed for the layman, but it should give you an idea of where money is going.
Keep in mind that nonprofits have a startup phase like most businesses. While the intent may be to have 90% of donations go to their charitable function, there are expenses to get the nonprofit started - legal fees if nothing else - so that a new nonprofit may need a little slack that you wouldn’t give one with a longer history.
As for the next world war: you must be a romantic to think that we’ll fight over something practical like water. I’m fairly certain the next world war will be the result of either stupid posturing or religious/political ideology.