Trying hard not to share spoilers. Picking away at some of the conversation around this paragraph to make sure nothing is given away.
From Protector of the Grey House:
“There’s a difference?” He continued to watch her intently.
Natalia yawned as exhaustion gripped her. “Donald…kills,” she yawned, “anyone he chooses; uses women. Vincent has built…a network of humans…he can…” she yawned again, “protect and…” Her voice was soft. She shook her head. She shut her eyes and took a deep breath, bringing her thoughts back in line. “Vincent doesn’t kill anyone unless they’ve hurt him or someone he protects.”