Two things need to be fixed.
The knifing mechanic takes to long to trigger, so you just end up dead if you try to use it, and the barbed wire on the towers and bunkers kills you at way to great a distance.
It occurs to me, that you see every prior character that got hit by a nuke as a mutant/zombie/'living impaired person' and the nukes seem to have little to no effect on the zombie population... is it possible that whoever is firing them is doing so to increase/empower the zombie population?