Good Morning, Kei
So, when he said “a man’s gotta do what a man’s gotta do”, he meant it more generically, it was not like “If I am truly a man, I must take revenge.” He was more in the mode of “I should mete justice by killing this person.”
When I say the word “just” in the context the man did, that means that I am making very simple something that is in actuality quite complex. Let’s start with the word “should” in context. That word in context goes straight to his conscience. He is saying that it is “right” for him to take revenge (seek justice) against his child or whomever he sees deserving of punishment. However, the gospel tells us how to go about seeking justice, and it does not say that we are to go about punishing people on our own, i.e. we are to first talk to the person, then if he does not listen, get another, etc. We have laws to follow, and our Church supports societal laws, generally speaking. Following these laws is what a person with a well-formed conscience would do. Instead, this man is using an untruthful source for his idea of “should”. He believes an untruth. Does a person who believes an untruth to be true know what he is doing?
And again, in order for any person to have the premeditation to do violence to another, empathy has already been blocked in the person’s mind, the other is expendable, worthless (there are some exceptions of course, as in war, depending on the mindset of the soldier). Does a person who has the illusion that someone else is worthless or expendable know what he is doing?
This was the mindset of those who hung Jesus, they did not see his divinity, and they did not see his humanity. In addition, those who wanted the other two men to be crucified did not see the human dignity of those people either. They did not know what they were doing, as Jesus observed.
Again, he sees the breakout as the “right thing to do”, which originates in his malformed conscience. His “glad” acceptance of the death penalty for himself is a curiosity, but it makes sense. Here is what he could have been thinking:
“Killing that guy was worth dying myself.”
Which is much different than:
“killing that guy was truly right, and society should acknowledge that, and exonerate me.”
This is a person whose mind is a jumble of what he thinks is right and wrong, but he is behaving in the way his gut tells him, to take revenge on the person who has wronged his family. He is blinded by his desire for revenge.