I don't understand why border patrols guards or police need to even use their tazers unless they are outweighed or out numbered, they should be trained in basic judo and wrestling techniques in training so they know how to hold and restrain a person without using an electric heart stopper on them.
Also when a nasty person gets a uniform they usually get more nasty when they think they can get away with it, at night on the border for example. Sometimes all it takes to De-escalate a situation like this is for someone (within the uniform group) to shout at the main aggressor, something like "What the F**k do you think your Doing?!" and everyone kind of realizes things are going to far.
Unfortunately sometimes this doesn't happen because no one wants to argue with their own side, even when they know they should.