The falling being eternal or not, people got scared and spoke about it, which made everyone more afraid of falling, and the nearby bridges were simply impossible to reach.
Edward became aware of the plan and agreed with everything. They must only retreat because the castle is finished, and they must do it together with the Blood Temple.
No matter if they are enemies or not, this was time for a truce since every dead will turn into an Abyss troop. But the people on the safe bridge did not think this truce was still necessary.
"You invaded our castle and now want to share this small bridge with us? Go back to the castle and die as you should." One of the senior mages spoke to some warrior of the resistance that accidentally pushed him.