Carla, I have two ideas.
1. Before the article comes out, have a general conversation about human rights abuses in the world, bigotry, etc. Establish a general concept of what bigotry is. Don't associate the JW's just yet.
2. Talk heart-to-heart with your beloved on how their involvement with the JW's affects your life. Be as sincere and human as you can be. Talk about the time away, your devotion to them as a person and the features you find most attractive in them. Finally, hit them with how the bigoted talk affects you personally. You can ask questions like, "If you are looking forward to Armageddon, does that you also look forward to me dying?" or "When elder XX talked about people in the world being so wicked, was he talking about people like me? Do you think I am wicked?" or "You just came home with another problem at the hall. Explain again how those of us in the "world" are so much worse?" Repeat that those phrases and comments hurt you personally.
These are the two best ideas I can come up with to inoculate your partner before the article comes out. When they do get around to studying the December 1 issue, ask them to come see you when they get to that paragraph. Name the number. If they ask how you know, say, "I have my sources." Have a heart-to-heart on how that paragraph affects you as a couple.