Regarding Bester:
Several factors participated in creating the Al Bester we know. But in the end, the worst was his infallible belief that he was right, his refusal to doubt (hidden behind various excuses like "superiority" and "end justifies means"). Environment contributed to creating such a person. The Corps knew which buttons to press, but in the end Bester chose this. He refused from putting himself on the other side of the border, imagining what his deeds meant to other people.
While a long-time proponent of Narn expansion, G'Kar considered the Centauri perspective. While a long-time proponent of Centauri restoration, Londo had not closed his eyes to the Narn perspective. While a proponent of telepaths, Bester failed to see the perspective of anyone but himself and "his" telepaths.
Regarding conflicts:
Real-world conflicts are not very different from imaginary ones. Art imitates life, one might say. Depressing, yes. Deserving of consideration, too.
Now the Narn-Centauri conflict, that would be very similar to the real-world conflict between Palestine and Israel. A situation where moderate factions of both societies have been crippled by extremists on both sides. Extremists who, enjoying foreign support, can act independently of moderate factions and ruin every opportunity for peace.
A situation where a cycle of retaliation has started and nobody has succeeded in breaking it. A tit-for-tat scenario gone out of control. Regarding that situation, I hope that some day and way, conditions will turn against extremists, allowing balanced outside pressure to bring both sides together. Giving up hope would be easy but wrong. It would just let the problem grow.
