Is Gizmo a war criminal?

I have Gremlins 2 in mind specifically. Yes, the Gremlins bully him. You could go so far as to say they torture him, but the worst they do is put him in a photocopier and pull velcro off him, not really bad torture like pulling out finger nails or cutting off limbs… But Gizmo’s reaction is to kill Mohawk! And he doesn’t make it quick and clean either – he sets him on fire and watches him burn to death. Isn’t that a little disproportionate?