Their issue is simple. They, or rather the minority not too clueless to realize how they are being manipulated, are opposed to spreading the industrial and economic development and prosperity of the West to the rest of the world. They (again, the minority who understand what is really going on) want the little black and brown peoples of Africa, Asia, etc to remain mired in poverty. Their motivation falls into one or more of the following categories:
1) They are hard core socialists, or even Marxists, or devotees of some similar utopian, revolutionary vision. They realize that prosperous societies with large middle classes are "revolution proof". The acheivement of global prosperity and a global middle class (which should occur within about 50 years under current trends) will put an end to their dreams of creating their "perfect" world.
2) They are global "poverty pimps," or enablers thereof, with vested interests in expanding and perpetuating a system were Western funded global organizations dole out handouts to and maintain expensive "programs" for the "benefit" of the little brown people.
3) They are full of irrational guilt because of the success of their own culture, Western Civilization, which they consider evil. They would rather that billions of human beings be kept in degradation, and suffer political oppression, than that they join "us" in our decadent over consumption of Mother Earth's resources, our souless consumerism, yada, yada, yada. (Of course they are not going to forego the benefits thereof, they just want to deny them to the little brown people who are living in a blessed more "natural" state, i.e. poverty.)
4) Grading into number three, they are simply destructive nihilists who resent those who build things up, and desire to tear them down.