The MWBOS wanted to annex everything and everyone, more like a nation and less a non-profit organization. The original BOS has a motive for securing tech, not just for kicks and giggles. They wanted to preserve it, and use it to help humanity in the long run, right?
By "Annexing" territory they were also helping. They were teaching people how to farm better, how to irrigate crops. They provided protection and medical care. They were helping people. All they asked for were recruits.
Why is it when a faction takes land without fighting and helps people. They are seen as "bad" :rolleyes:
The Original BoS kept the good tech away from people by force if need be and helped no one. Years (decades) later even after other factions still managed to gain power and develope and get hands on pre-war tech, the BoS continued to attack other factions in the name of taking tech away. In the end it pissed NCR off and they went to war. Like Veronica said, all the BoS do is make enemies of everyone. Does that sound like a Faction that want to help people to you?