"Killzone: Shadow Fall" ending plot analysis

Let's start with this paragraph. My people... My people... Sons and daughters of Helghan… Sons and daughters of Helghan... For many years, we have been a broken nation. For many years, we have been a broken nation. Shunt, oppressed, and conquered by those we sought to escape! To be twisted, to be repressed, to be conquered by those from whom we wish to be free! Ten years ago, I asked for time, and that time was granted by you. You, the strenth in my arms, Ten years ago, I asked for time, and that time was granted by you, the strenth in my arms, the holders of my dreams! You are the strength of my arms, the holders of my dreams! Our forefathers embarked on the greatest exodus in the history of all mankind Our forefathers embarked on the greatest exodus in the history of all mankind An exodus, for freedom, Helghan became that freedom. Our new world, changed our bodies. At first, Helghan became that freedom. Our new world, changed our bodies. it weakened us, but in fact, we were growing stronger. It weakened us, but in fact, we were growing stronger. The time you've given me I have rebuilt a nation I have rebuilt a strenth And I have rebuilt a strength. The time you've given me I have rebuilt a nation and I have rebuilt a strenth Rebuild our pride! And I rebuilt our self-esteem! Our enemies at home have been re-educated. We've given them new insights into our enemies at home have been re-educated. We've given them new insights into our course we gave them a new sense of our future. On this day, we stand united once more. On this day, we stand united once more. those driven to divide us will hear our voice. On this day, we shall act as one, those driven to divide us will hear our voice, On this day, we shall act as one, and we shall be ignored no more! On this day, we will be one and we will never be ignored again! The defenders of Helghast dream, NOW IS OUR TIME! Guardians of the Helghast Dream, our time has come! The story takes place two or three years after KZ3. At the end of the 3rd generation, the last escape bunker flew back to the Haier Steel planet, and the two soldiers said "Welcome home Sir" to the people in the escape bunker, welcome home Sir, although there was no explanation, but I think this should be Jorhan Stahl. Basically, after ISA expelled the Hell-Steel men from Vekta, the rabid Hell-Gate-led Stahl decided to destroy Earth with spaceships and radiation bombs, but ISA forces destroyed the ships before they could reach Earth, instead contaminate Hell-Steel with radiation. 100 million Helgast died. Then, probably because of human pity and the expectation of seeking, the remaining Helgast were relocated to Vekta, their original home and ISA sharing half the planet, with two cities separated by high walls. ISA, also known as VSA because it is on the planet Vekta, you are the protagonist of the game Lucas Kellan, when you were young, the walls between the cities were not yet completed, and the protagonist's home was unfortunately turned into the territory of Helgast, so you and your father were expelled, and the brutal Helgast soldiers killed the protagonist's father in front of you. At this time, Thomas Sinclair appeared in time to save you and trained you to become a shadow warrior (that is, special soldiers who carry out secret missions)14 years later, Sinclair as your commander has been giving you some tasks, the protagonist is captured in a mission, and then VSA uses the method of prisoner exchange to exchange you back. Here you first encounter Echo, an enemy female soldier, after Hillary Massar, a biological doctor of the intelligence VSA side, successfully defected to the side of Helgeist. At this time, Helgeist's ambition to start a war was exposed, and the protagonist was sent to perform various tasks, and met again and was saved by Echo. Because of the common desire sought by the two hearts, the two people developed a little friendship between men and women. The plot of the following chapters is unbelievable. Just by virtue of the two people of the protagonist and Echo, they carried out various tasks and then killed all the way to Stahl's lair. Finally the protagonist finally met Stahl, here is a hope to discuss with you, because the plot of this game I did not understand much, is the side of the game experience, the protagonist let Sinclair do not attack because Stahl side has prepared for the war, so if the war broke out, will it be broken? Sinclair's last move surprised me, too. You killed Stahl, but you killed the main character? As for what? What do you think? Finally Echo sneaks into the assassination of Sinclair is very consistent with the character, reasonable, but not very consistent with the principle, could have given up so much sacrifice for so many people, and finally embarked on the assassination road, which is not broken again??