Like I said: she could resent you for leaving her to be deployed, as irrational as it sounds.
All of the bile she's spewed at you since she left could be a case of pulling back -- she might have been scared to find out that she has feelings for you still, and is trying to push you away.
That doesn't make it hurt any less -- believe me, I've been there.
It doesn't make a difference in that there's nothing you can do while deployed.
Treat interactions with her as you would with any complete stranger; be polite. If she tries R talk, tell her "we have a lot to discuss when I get home." Commit to nothing.
IGNORE the spew. Once you see her going off, close or delete the email.
Me: 44, Wife: 39 M: 17 years T: 20 years Bomb on 08/25/09 1/13/10: MC started 1/28/10, 2/8/10: More bombs 8/28/10: Wife moved out No talk of D, no movement