When a 11 year old is expressing his intention to kill his own father, there is a huge extent of anger, irritation and pain he could be carrying within him all these years. This could pretty well show in his behaviour in school or otherwise. It's also might be extremely painful for you to be not understood & disliked by your own family. I also see that your wife is discontent & unhappy as well. Overall there is an environment in your home in which none of you can truly feel at home. You need not carry this sort of burden for ever. Please consider a family therapy where all of you could be helped by a professionals to relieve the tension, understand each other's perspectives better and improve relationships. Your son will be helped separately if there is a need. Good Luck.