Look at it from my point of view
FWIW, to me Robert's tone was way off base.
Elisee arrives and posts several well-written essays on political topics, and seems likely to become a significant contributer...if he stays. DL leaps out of self-imposed exile to try and drive Elisee away before he can settle in, should he choose to. To me that's unwarranted interference in the HabitableZone; it's an attack on us.
DL was once a Zoner, but now he's taken a stand against the HabitableZone. Why should I welcome him?
