Glenn quietly accepts what Connor says, even though he doesn't agree with some of it. There's logic in there that he can't deny just because it doesn't "feel right".

"...I would not exist without them, either. Their intervention."

His head tilts slightly.

"My unique physiology is thanks to the genetic material they found on some space debris. Humans wanted to see if they could make those traits into a living weapon. It is pure luck that even though they succeeded, they did not see it."

There isn't any ill will in his words; it's a bland explanation as any.

"Only two people in my life made me feel like I belonged. That is.. enough, for me. To know that even some are kind."

Humans, indeed, are complicated. Himself included. Regrettably.