Jeffrey believed there had been two incidents, but he also believed that it was likely more than that. Jessie was working really hard at minimizing, and Jeffrey wasn't stupid.
"Well, protecting loved ones is important to a given point," Jeffrey said. "When it takes away your loved one's right to choose, then it stops being protection and starts being controlling and domineering behaviors. So, there's a part of you that evidently doesn't trust Ruby to be able to make good choices, and it is significant enough that you've felt the need to disrupt her relationships for her. And in both of the situations you mentioned, you chose violence to do it, and that was your first line defense, not your last resort.
"Even if what your father said was something he believed, you were a military man, and you're not the first military man I've met. You surely were trained that nonviolence defense is just as important as violence. Somehow that wasn't a lesson you took to heart though. And, even if somehow you missed the impact of it then, it doesn't appear that you picked up entirely on what your training here should have showed you. In the short time you've been here, you've surely had a chance to see how Robert and Brian and Michael have handled assignments. I know they have had occasions to fight, but in the years I've known them, they use every nonviolent means at their disposal and violence of any kind is the last resort. You've missed that, though.
"I know you're a werewolf, and that's neither here nor there for me. However, you're overthinking the transfusion. The wizarding world doesn't have an army, so that means you served in the muggle forces. Muggles don't believe magic or magical creatures exist, so they wouldn't have known to check any donations of blood for lycanthropy, and their instruments wouldn't have detected it anyway. How it got into the military blood supply, I don't know, but I wouldn't be too quick to jump on the conspiracy train. That might be going a bit too far."