Luke 18:1-8
When I was doing marriage and family counseling I would often have a husband or wife--most often a husband--who would walk in visibly angry at the first visit. I always found that stimulating and a challenge; in fact, I preferred open hostility to indifference. You can usually talk with an angry person if you are willing to listen, provided the person's anger is motivated by a sense of injustice or a fundamental wrong in life. That kind of anger comes out of a passionate belief that life could and should be better than it is. When you are willing to listen to the person's injured hope, you have a starting point.
The widow in Jesus parable will not give up until she gets justice.
Jesus says the judge is dishonest and wanted a bribe.
According to William Barclay, this man had to be a gentile, Roman appointed judge. The jews took their disputes to tribunals, but these judges were notorious for being corrupt.