Jeri, my answers,

1. Why do you write?
Like so many people, I enjoy the exchange of views. I like having mine challenged and questioning those of others.
Think debating society or TV/radio current affairs debate progs.
I love those too.

2. Who are you writing for?
The other contributors. Mostly I respond to something they have said and put something to them.

3. What outcome would make you think you could stop?
I do stop when the discussion has run its course, or the others resort to abuse.

I do not like "hatefests" either.
Why do some people get so angry when disagreed with?