No one can tell you how to feel or how to react to finding this information out about your husband, but as someone who was laid off last year, I'd recommend not confronting him about it at this time.
In my case, my company had expanded the sales force a year earlier, hit some issues with the FDA, and experienced a massive devaluation in stock price. They thought the best way to improve it (and save some executive's read ends) was to eliminate 25% of corporate jobs and 40% of the sales force. I was affected because my rankings were low in 2008 despite being on maternity leave, getting a new territory, a cancer diagnosis and 5 months of chemo. It didn't matter.
I can justify my performance, but the scarlet letter of having been laid off remains. I have been back to work 10 months, and I still have issues with my self-esteem, my abilities as a competent employee, etc.
Some of the 200 colleagues I was laid off with have either not yet returned to work or have just received offers almost a year later despite good performances and appraisals. The economy just stinks, and each person processes the emotions differently. Some friends went into a state of denial and couldn't look for a job immediately - I was frantic to get back to work and wish I'd done better dealing with the emotions of being laid off less than a year after having a baby, getting cancer and finishing treatment.
There may be validity in the performance appraisals you saw, but there may also have been friction between his supervisor and him that you don't know about leading to less-than-stellar appraisals despite being a good worker.
For now, try to channel your frustrations elsewhere. Try to use that energy into making the most out of the situation, finishing your degree (if possible) and helping him feel supported so he puts forth the initiative required to get back to work as quickly as possible. Be supportive, though, if it's a tough road. My industry is laying off another 5000 people this week from 2 companies alone. That makes almost 30K since last January (2009).
Good luck - I hope this is only a temporary setback.