I don't think you are angry, I am trying to show you that maybe someone could construe your statements as that. Also, anger could be subconscious, that's the "enduring type." You often complain about how believers act. Frustration is a form of anger. Do atheists often come across as angry without knowing it?
Well, okay, if someone chooses to read anger in a post where there is none, that's kind of their issue. I have not worded anything to show any anger, and I'm sure posts could be construed according to any bias or mood---but it's not there.
As far as subconscious etc----I don't think anyone here is qualified to psychoanalyze me based on some posts---but if they choose to do so, then that is on them too. Certainly not something I need to answer.
Do we come across as angry without knowing it? I think the reader's bias can cause them to see anything they want, so it's not really the atheist's problem if no anger was intended. Can an atheist get angry? Sure. So what?