User blog comment:ArchKnightUlthering/Metro 2033 Alternative Ending/@comment-174.253.134.16-20120925180319

The reason why the Dark Ones seemed to be attacking the Metro was a misunderstanding. They were trying to communicate with the survivors but their mental powers were too strong resulting in death. Artymon was exposed to the dark ones as child (in the book) which gave him some resistance which alowed them to communicate with him. That is way they wanted to protect and use Artyom as an ambassador of sorts.