I need to sacrifice myself just once, for science. I imagine it's just a glitch that'll likely be fixed in future, but before it disappears I do want to check it out. Basically, it may be an exit point for a Red Door loot room, but that doesn't explain why it's murdering folks. If you're unfamiliar with them, they're elusive red doors scattered throughout Verdansk which teleport you to rooms filled with powerful loot.
There's no concrete reason from the devs on why this door has wrought death, but players in the comments have surmised that it's linked to the magic Red Doors. To see this content please enable targeting cookies. I might give him a call actually, he'll probably find a way. On the mission Vendetta, 3rd mission in, on veteran, I keep dying in the burning building I dont touch or go near the fire but keep dying The peo. I suppose the difference here is that he technically passes through the door, but with this Warzone equivalent it doesn't seem possible.
Watching it reminds me of this Vine where a guy exclaims, 'This is how you dive through a piece of shit door', before he cleaves a hole in a door with his head and his body folds in two.
The clip I've linked below shows them run headlong at the door, but get downed instantly at the moment of impact. A player on the Warzone Reddit discovered the Door Of Death in the Salt Mines area of Verdansk.