homeschool... I go through many emotions when reading this Forum and anger is one. I see how many people have been negatively affected by the WTS, in many cases, way worse than me. My parents weren't 'in' or baptized when I was growing up. Thank God! But I am now faced with family (my Dad primarily) who is 'in' and has been for years.
One of my strategies has been to try to recognize when anger begins to rise in me, take a step back for a second or 2 to re-group so that I don't react out of anger, and process/re-shape the anger into something that can be productive, positive, and growth oriented (versus the opposite of these). This is a conscious and physical effort.
I had to develop this when my Mum became chronically ill. She was not a pleasant person to be around sometimes and instead of reacting to her negativity in like kind, I tried to channel the negative emotions into something else - something positive. I recognized that I was upset for days afterward but she didn't remember 30 seconds later! I decided I didn't want to treat myself like this.
It takes time and effort to develop this but it can be done. Sometimes not reacting is the best action. Staying calm (as hobo ken has done with the elders in his congo, for example) is definitely achievable and has interesting results. Without the anger coming back at them, most people cannot maintain it and the adversarial condition dies. Sometimes changing the subject is needed. Other times it is asking questions to get the other person thinking. I try to relate situations to the specific person so they can grasp an understanding as it would pertain to themselves. I do this at work a lot. It has good results. Sometimes the only place you can come to is an agreement that you disagree.
Of course... installing a punching bag might be the best way to process the anger! You could build strong arm muscles this way. Whatever you decide, I think using anger for positive means is the best strategy.