Say i am the Ottoman Empire, How should i deal with rebillions in colonies-do you feel there is an international requirment that they be suppressed or should this be left to the colonizer? If international requirment-how is this to be enforced- how will countries be aided by other European nations?
The only type of "international requirement" to suppress rebellions, say in the Balkans, would be formalized as treaties between colonizing powers. It seems that such treaties would work contrary to an ally's benefit because there may be at the back of some collective mind the benefits to be gained by taking over said rebelling colonies for themselves.
I guess you would need to consider each rebellion on a case by case position. Obviously answers would depend on how important the colony was to the Empire and what resources it contained, and its proximity and value. Becoming involved in disputes between other countries and their colonies would be a very complex issue, as it might create a precident and it could also mask an armed intervention to gain the colony itself.
It really depends on whether or not you have the strength to put down the revolt. Many colonies were lost because they were just too far away, and their patron country just did not have the presence to force down the revolt.
You might like to have international support in dealing with rebellions. After all, you have rebellious colonies and not that much power. But there are two issues to consider. First, what if you are asked to help subdue others' colonies? Do you have the ability to live up to such obligations? Second, do you really want European armies on your territory, even to help protect you? As the line from The King and I goes, "might they not protect me out of all I own?"