"It's probably more accurate to refer to this more aggressive public movement as antitheism"
I disagree that this "movement" is aggressive. It is only perceived as aggressive because people are not used to having their religion publicly questioned, and held to the same standards of rational scrutiny as other products of human thought. I also disagree that it is "probably" anti-theist. The "new atheists" sometimes ridicule theists, but concede that merely believing in a personal god is fairly harmless in itself. I think they are definitely anti-dogma.
Hitchens seemed pretty anti-theist, and I don't recall him ever saying that belief in a personal god was "fairly harmless".
I was using 'aggressive' from the perspective of those using the term 'new atheist' - should've been more clear on that. I don't think 'new atheism' is 'aggressive', except to the extent that it's being vocal vs 'in the closet' year ago.
Also, 'new' atheism is viewed as actively oppositional - loud, proud, 'coming out' in public, etc. Being aggressively atheistic is a hallmark of those labelled 'new atheists'. It's probably more accurate to refer to this more aggressive public movement as antitheism, but that would be another label/word which would confuse people. Putting 'new' in front of the old word, I think it becomes easier to rally the troops, so to speak.