Gosh this story is SO INTERESTING. I still don't get why the anime doesn't have a a 2nd season.
This whole flashback arc is just showing us that everything happened because everyone wanted revenge for something or the other. Yona making the decision to let go & forget revenge is clearly the right answer, I guess it also helps that Soowon is dying regardless of if she chooses to kill him.
Everyone so far had reasons for why they killed others. Yu Hon started it, but he did it to protect his wife I suppose. Il began distrusting him after that so whether he killed Kashi or not, it was enough motive for him to backstab Yu Hon (literally). Keishuk saw this or conveyed it as such & ofc Soowon wanted revenge for that. Now Hak wants to kill Soowon for the betrayal & for hurting Yona but THANKFULLY, he is loyal to Yona & he has friends who stopped him from going down that path. If Hak had killed Soowon, it wouldn't have ever ended. Keishuk or one of the tribe generals (sky/earth) might want revenge on Hak for killing Soowon & would have come for him & you know this cycle would have continued endlessly.
Yona stopped it by rejecting the idea of revenge. Even her mom, Kashi, rejected this idea & is the only reason they had peace for a little while. If she had wanted revenge against Yu Hon things would have been chaotic. She even managed to become friends w Yon Hi because she let go of that idea. The peace that they had broke because she died, starting a new cycle of vengeance.
I still think both Yu Hon & Il are shit brothers & rulers. I respect Yu Hon for being so loyal & loving but he's way too violent/impulsive & narrow minded af. Il on the other hand is a fanatic who can't think of anything but God & depends on this God to save everyone. Yes, god exists & is literally Yona now but he forgot something important; "God helps those who help themselves". It's a very popular idiom in my religion. He can't sit around like a doll waiting for god to do everything. What is the point of living even?? He actively made sure he let his kingdom fall into ruin by waiting for his gods to come & save his sorry ass. Yu Hon & Il are basically on 2 extremes. One being way too against god & one being over dependent on god.
I actually like Soowon a lot. I know many ppl here hate him, but he is an interesting & complex chara. I don't & can't ever forgive him for trying to kill Yona & betraying Hak but him being so apathetic makes him an interesting chara. Even while being quite emotionless, he would have been an amazing friend to Yona & Hak if their dumb parents didn't have so much damn drama going on. Imagine if Soowon showed all this loyalty that he has towards his dad & the empire towards Hak & Yona instead. They would have been perfect to balance out all his apathetic & emotionless rash decisions. He even tried to give Il a chance to prove himself as a worthy ruler which he failed to do & thanks to toxic Keishuk, he decided to go down the path of vengeance. We all know that he truly looks up to Mun Deok, admires & trusts Hak, cares for Yona etc. but his thought process is twisted & thanks to the whole cycle of revenge going on, he prioritized the wrong feelings.
I kinda blame Yon Hi for being incapable of reigning in/reprimanding both her husband & son. She means well & has a good moral compass which the other 2 lack, but she prefers being an escapist who lives in her own lil bubble ignoring the chaos everyone else is creating around her. She should have been HORRIFIED that Yu Hon killed all the priests & done something to show her displeasure but she did nothing at all. Again w Soowon, she can see that the kid is spewing some psycho shit about killing the king & his uncle but isn't doing anything to actively correct or stop him.
This became so LONG omg..
ANYWAY, Hak, Yona & the happy hungry bunch are my favs xDDD I can't wait for the next chapter