system
Given the following post, respond as if you're commenting on Reddit:
human
[Command and Conquer] Does Nod have any legitimate grievances against GDI or are they purely evil?
gpt
In the beginning, Nod claimed to speak for the underprivileged, broken, and ignored third world nations. The countries left behind following the cold war, and basically left to rot while the rich western world would go on to unite and prosper like never before. So in a sense, they did begin life as a way for the powerless to gain a voice on the global scale, and to bring attention to the fact that the United Nations had been ignoring legitimate issues in favor of their own interests.

When Tiberium first began to spread across the planet, it was Nod that pioneered safe harvesting methods, and they put a portion of their unimaginable profits toward some of these undeveloped nations, garnering goodwill and putting a black stain on the first world which was unable or unwilling to do the same thing. But it was nothing more than a ploy to increase their media attention and make the people that Nod DIDN'T directly aid get even more upset at the western world.

They used that boiling anger to fill their ranks and sow the seeds of religious fanaticism that would fuel Nod forward through the decades. 

So... the TLDR in the early years is that it's complicated. In a sense, they did bring to light a lot of legitimate problems and mistakes made over the 80s and 90s by the big players of the world. But they only did so to further their plans for war and conquest. 

In later years, it could be argued that Nod's lack of fear toward Tiberium, and their superior technology related to it, gave the people on their side a slightly better standard of living. At least, those in the upper echelons and inner circles of Kane's power. If GDI had put the same amount of resources and thought into Tiberium as they did standard military hardware and old-world construction in the face of armageddon, they might have made much better progress in eradicating it. 

But really, by the time of the second war and beyond, Nod's only real reason to be angry at GDI was religious fervor and the fact that it was the only real competition they had for people, territory, and resources. And to be fair, in a world falling apart due to tiberium, those are some very legitimate problems. But Kane used the spiritual devotion his followers showed to him to whip them into an ever-deeper frenzy, to make them fight harder and better, and ensure his final goals.