Gary, there is no easy answer to your dilemma. As a Witness, your wife is trained to 'put Jehovah the Organization first', even before her own husband. Since she has been brainwashed to believe this is "the truth", her defense mechanisms automatically go up every time you say anything negative against the organization. The fact that she could actually say that the WTS doesn't point out other religion's errors shows how much under their control she is.
There used to be another poster on this board who found himself in the same situation as you. His family did not exactly shun him, but because he was in a disfellowshipped state, their contact with him was fairly limited. He missed out on seeing his grandkids grow up because his daughter severely limited how often he could see them. His wife refused to listen to anything 'negative' about the Organization and obviously did not like him posting on here. He got to a point where he was either going to leave them once and for all or go back. He ended up getting reinstated so he could have the conditional love of his JW family.
I hate to say this, but chances are, down the road you may have to face the same choice. Witnesses are trained to put their unbelieving husbands on the back burner and if it wrecks a marriage, too bad so sad. They pay lip service to "being in subjection", especially when it comes to their hubbys visiting an "apostate web site". Unless you can get her to stop and think, you'll continue to have problems like this.
I did a project last year that uses A LOT of the Society's own quotes. It shows that they are liars, false prophets etc. etc. If you'd like a copy, please PM me with your email address and I'll send you a copy.
All the best,
Mary