Is Alzheimer A valid reason For Divorce?

There's a debate raging online surrounding advice Pat Robertson gave on his show the other day.  Pat suggested that a man whose wife is suffering from Alzheimer should be divorce.  Basically Pat just gave out the worst advice I have every heard coming from a man of God.


 I'm sitting here thinking what if this was my husband of 25 years Pat was giving this kinda  advice to. It's scary as hell  to think my husband would walk away and leave me because of his own lust is scary. Pat have mange to downgraded the sanctity of life with the comment "she's dead". What ever happen to " For better or worse, in Sickness and in Health, till Death
do us part." 
 Any way, some are saying  Pat  was not telling the guy to divorce her, he was telling the guy to file for divorce if he wanted to see other woman while still being married. Some are saying that Pat should have told the guy to grant his wife a divorce  instead of telling the man to divorce his wife. So, the question become  how can you grant a divorce to your spouse if they can't consent? Can you do that? Is Pat really telling the man to abandon his wife for his own pleasure? Is Pat giving the man the OK to commit adultery?