If you see being vile morons as understandable sure.
But mostly not justificable in the end.
if people spit game at you you spit game back and it takes a lot of personal restraint to not lash out. Someone calls you a fuckwit your first impulse is to call them a fuckwit right back. And it only takes one slip-up once and then everyone says 'oh well you responded in this way so your opinion is discredited forever'
what a great situation