You don't understand the term IWS?
I do, but not sure you do.
Being anti-colonialism, is a good thing.
Just like the word "liberal" can have many meanings depending on where your standing in the world and what time period your discussing using that term (liberal in America was something very different not that long ago) being anti-colonialism in the modern world in the majority of European and American circles is a description of how these people view those who operate the majority of the wealth. The original concept was one against military might but it has evolved in modern times to consider economic might to be seen as the exact same things as military might.
Several new books have come out recently to explain that most of the modern movements that some consider to be socialist in design are actually more closely related to anti-colonialism in their execution and attitudes.
Of course the original usage fits how the progressives saw our involvement in places like Iraq as well.
Put short, the modern concept of economic might being seen as the same as military might allows those who hold these beliefs to see any success by those with the economic might as actually stealing their success from the masses. That is why they seem to be socialist in many ways when they are out to punish the "rich".