Abusive "argumentation" Bitter and hateful people might be full of so much love and positivity to offer the world, but if they never have the chance to understand that then they may have to live with their fear of others for the rest of their lives. They have extreme passion that can be utilized to help others and to help take care of the Earth if they have the chance to redirect their effort.
Or they may remain as they are as a choice regardless of interaction with others, and we may not be able to help them no matter what we do. We cannot control others, but we can try our best to inspire hope within them.
You have a duty to your fellow human beings, because it is up to all of us to continue our evolution. If you feel like you see a miscalculation in the equation of society and you have the courage to face adversary head on to balance the equation out in order to pursue peace, then by all means please do, but if you shout at someone, belittle them, or become violent with them, then have you really given your best effort? I don't think so.
You have to talk with them; not at them. They have already been talked at, it doesn't work, and that is part of why they are upset in the first place.