It could be "rage" but maybe it's righteous indignation at an arrogant organization that calls itself God's only true organization on earth and yet doesn't live up to those claims and ends up bloodguilty for many thousands of its members. Maybe it's righteous indignation at a whole nest of false prophets, hypocritical pharisees, and blind, unreasonable followers who are quick to shun an individual for speaking his mind? What other church in Christendom is like this? What other church in Christendom kicks out its members for having a differing opinion and telling their family members to shun them in order to coerce them back into the "right way of thinking?"
Is this righteous indignation on the part of the so-called apostate justifiable? Or are you saying they should just shut up and suck up?
And I don't believe that most ex-jws, as you say, join another church. From what I infer, it seems like most ex-jws steer clear of organized religion because the JW's have taught them by example that "religion is a snare and a racket."
Also, could you provide proof in your claim about battered wives of second husbands. I've never heard of this.