What.

[It's the first time Hector is hearing this. He narrows his eyes at Iskandar.]

'They might not want to leave me alone' my ass! Are you telling me you are the source of the grudge that brought them here?

[It seems obvious enough to him. He's seen demons with very little reason harbor tremendous grudges. They tended not to stop until they were avenged or dead.]

You have to stay inside the walls. It's the only place you might possibly be safe from them.