How do I get over the desire to punch my wife's father in his small minded,...

[Nathan]

...racist, woman beating face? He regularly beat her mother(who is an absolute angel on earth) before she finally divorced him. He tells my wife that I'm not good enough and that our home/cars/things are garbage. I lost my job a little while back and he says "oh, tough break..she can come live with me if you can't support yourself" then he gives a job at his local business to my "brother in-law" to hold him over until he got back on his feet. It's like he enjoys taking these little jabs at me and after 3 years of it my blood boils at the mere thought of the man, unfortunately my friends are no help when I try to talk to them about it and my wife just gets upset. Thank you