From my experience, most deletions are from thin skinned members who love to dish it out but can't take it. They're the ones screaming about free speech and are the first to censor.
Most deletions on A'gon are done automatically as soon as a post is reported. The right parts are clicked on and the post vanishes without being inspected. I've had a few reinstated after asking why and pointing out that no terms of deletion were met. Some members love to tag team by contacting allies to do the same.
It's just a game here that some love to play. It's all they have to fall back on. I've come to accept it without asking anymore for a post to be put back up knowing that it was read by many, including the offending member (I've even gotten atta-boys from members DM'ing me).
All the best,
Nonoise