I'm easily angered by things I strongly disagree with. Immediately I want to tell the person why they're wrong and educate them. In some ways, at that moment the person becomes a villain. Everything they are is infected by this one opinion and all I see is the worst I can imagine.
Usually, my comments from anger miss a lot of the context and focus on the specific thing that upset me. It's a relief to get it all out but then hours later I look back at what I said and I see the holes in my argument, the gaps glossed over by rage.
Instead of rage tweeting/texting, I've found a solution that's almost as relieving. Opening a new note, and venting away. There's no need to filter, no need to have a convincing argument, it's all anger. Then hours later when I've calmed down I can re-read the venom, I find what's worth keeping and see the holes as plain as day.
Then I can see the other person's viewpoint better and rephrase my argument from a point of understanding rather than judgement and anger. It's not as satisfying as a heated debate but it can be more constructive.