Sometimes people have a slip of the finger, especially on certain devices (iphones or the like). Sometimes someone just doesn't like you personally. There is no way to completely rid a community of that. Sometimes the phrasing was just really poor. "Low content" posts are sometimes downvoted and, yes, downvoting to express disagreement does happen. Stick around a bit. Get a feel for the place. Learn as you go. Brush it off. The next discussion is a chance to start anew. The size of the place seems to genuinely foster that more than other forums I have been on.

Peace.