All Empires are fraudulent and most of the problems in the World today were caused by the breakup of the British, French and Ottoman Empires.
The problem with granting the Kurds a new state is that significant Kurdish minorities exist in Turkey and the Turks will go to war to ensure that a Kurdish state is not born. It’s that simple. The US does not have the stomach for another set of wars in the Middle East.
Afghanistan presents a similar problem and so does Pakistan.
In Africa, most states are mere geographical expressions and have no meaning. For example, there is no reason why Djibouti should be a separate, independent country and Somaliland is not. There is no reason why Togo should be an independent country and why Nigeria should not be at least three different countries.
The problem is that when you start you cannot tell where you are going to stop.
Most of the problems in the world today are not due to colonial issues (except TO AN EXTENT in Africa where tribes are artificially divided) but due to islam, industrialisation, increased medical care (so more people live longer, but they are not equally skilled, and don't have the same opportunities) and lack of focus.
In the case of Kurdistan and breaking up Pakistan, there will be problems, but they're gonna happen sooner or later, you know it, so why not bite the bullet now?
In the case of Iraq, let the Kurdish state get more and more autonomy. Then it will become the Turk's headache and hopefully cause a Turkish-Irani war
In the case of Pakistan -- Pakistan has no identity right now, hence is inherently stable -- it was supposed to be the land of the Indian Moslems, but many of the Indian Moslems stayed on in India, so its aim was twarted at the start, then Bangladesh happened. So, what is the definition of Pakistan? Nothing.
Plus it has Pathans and Baluchis artificially separated from their kinsmen
Reduce Pakistan to Sindhis and Punjabis and much of the problem of identity is solved (except for Muhajirs) -- in the case of both Sindh and Punjab, the Moslem Sindhis and Punjabis are there, while the Hindu and Sikh ones are in India -- so the states of Punjab and Sindh are the lands of the Moslem Punjabis and Sindhis respectively
They then at least have ideological reasons to exist
Djibouti is a separate case -- it is somali by culture and ethnicity with a lot of Arabs. Somaliland and Putland are viable states and should be recognised
In the case of Togo, yes, this ex-German colony should be merged with the neighbouring states --> the majority Ewe are split between the states of Togo and Ghana
In fact I believe sub-saharan west africa should be joined into a larger "union" -- as the different people are too intermeshed for there to be anything BUT balkanisation as the alternative -- the current split isn't working either