Normally, it would be kind of fun to watch the verbal sparring, like with Julia and Uncle Brian in the earlier scene, but it's not. Both Jason's mom and dad are kind of witty, sarcastic, and that would be fun if it wasn't for the war that killed someone's son. Mind you, someone close in age to both of their children.
Also, it's just frustrating to watch people who could be okay throw everything away just from stubbornness and lack of communication. Michael had a chance when Helena sat him down to talk about the finances, but instead he exploded. Helena had the chance with the mix-up about the delivery date. But instead, they chose to be spiteful and passive aggressive, and that gives me such a gross feeling. The solution to the problem isn't simple, no, but certainly there are better ways to make the situation better.
To sum it all up, and to quote Jason, "I want to kick this moronic bloody world in the bloody teeth over and over till it bloody understands that not hurting people is ten bloody thousand times more bloody important than being right"
So, if you're feeling passive aggressive towards someone or being spiteful or mean or whatever, please take a second to reconsider why you're doing it, if it's the best way to fix the problem, and if you can, just BE NICE for the love of the world.