You're going to start moon wars when Canada has 10% of all the freshwater on the planet?
I still doubt that a war would end up happening over it, if only because it appears relatively cheap enough to extract that it's not worth the effort and risk to build a war-making apparatus to prevent other people from extracting it.
They found a bit of water essentially just by drilling down. If it's like that all over the moon, or even over an appreciable fraction of the moon, then getting it all for yourself is an unmanageably huge task.
Remember, the moon, while considerably smaller than the Earth, is still a very big place.