This incident reminded me of something I've been meaning to address here. Threatening to harm someone is not acceptable. It is not just another tactic; it is criminal. It is not acceptable when Christians use threats to intimidate those who would work with atheists. It is not acceptable when Christians use threats to bully atheists and other groups directly. And it is certainly not acceptable when atheists threaten each other over feminism or other differences of opinion.
I agree completely with those behind Atheism+ on this point: threatening others has no place in this community. It crosses the line from free expression to criminal behavior, and it cannot be tolerated. I'll continue to defend your right to disagree with others in the atheist community, and I do not approve of the attempts to marginalize you for doing so. But threatening others has no place in this discourse.