It sounds like right now your husband just wants to be a JW.
You can only leave when the cost of leaving is less than the cost of staying (whatever that might be). It's different for each of us.
To me, it sounds like your husband doesn't really care about any *reasons* why the JWs are right or wrong. He simply *knows* that they're right, and so he is amplifying the bits he agrees with, while downplaying the bits he disagrees with as unimportant.
Even if you tear apart the war excuse, he'll just say that isn't important, either. Something else suddenly becomes the really important reason why they are the true religion.