Before the Capitol battle, Gale had explained to Katniss his series of bombs designed to feed off human compassion: a small bomb would go off, and then when medical aid rushed in, a second bomb would go off, killing those people as well. Incidentally, it's this exact type of bomb that took Prim's life.
Answer and Explanation: Prim is killed by a bomb at the very end of the battle. Alma Coin sees an opportunity to turn the Capitol troops against Snow, and she decides the resulting loss of life from her plan is a worthwhile price to pay.
Reasoning: Yes, Gale designed a weapon, and this weapon went on and killed Prim. But this was war. Gale was trying to win, and he had no idea that Prim would be there. If I recall, he was extremely upset when he found out.
Deceased. Primrose Everdeen - Blown up by President Coin's parachute bombs. Messalla - Melted in an unknown pod that trapped him before burning the flesh off him.
By killing Coin, Katniss ensured a chance for a peaceful and fair country, avenged her sister's death, and liberated Panem from the fascist government. The Hunger Games franchise is still an iconic series of books and movies, with the latter truly cementing the property as an international phenomenon.
The Life of Primrose Everdeen (+Character Analysis): Hunger Games Explained
Why did Snow laugh when Katniss kill Coin?
Snow laughs after Katniss killed Coin because he enjoys the irony of the situation. He avoided the official execution ceremony, even though Panem's citizens still take their revenge on him, while Katniss ends up snatching away the victory and power that Coin thinks she has successfully secured.
Peeta decides, though, that he will go out on his own to act as a diversion in case Katniss and the others need it. Gale gives Peeta his nightlock pill in case Peeta's captured. They leave early in the morning, bundled up and styled by Tigris. Cressida and Pollux go first, leading the way to the City Circle.
After Prim's death, Gale leaves voluntarily because neither of them can avoid the matter of Prim's death having been caused by Gale's invention, with Katniss letting him go without a word. Katniss subsequently grows back together with Peeta, whom she finds she loves again now that he is recovered from his hijacking.
Katniss feels betrayed, most of all by Haymitch, who used her and Peeta. Eventually she wakes to find Gale there. He's badly injured and tells her the Capitol bombed District 12 after the Games. He got Prim and Katniss's mother out in time, but the District 12 is gone.
#CapCut Haymitch knew Katniss was planning something, she would never have voted for a symbolic Hunger Games and especially not for Prim. As soon as she did, he knew she was up to something and trusted her.
Gale's jealousy towards Peeta stemmed from his feelings for Katniss and his desire to be with her. Even after Katniss became engaged to Peeta, Gale still harbored feelings for her and was unable to fully let go of his jealousy and resentment towards Peeta.
Using knowledge from the movie and the books, let's break down how The Hunger Games ends. Coin killed Prim to destroy Katniss because, as Boggs (Mahershala Ali) explains before his death, Katniss is her biggest threat to maintaining her power over Panem because of the influence Katniss has over the people.
The double bomb that kills Katniss Everdeen's sister, Primrose, was designed by two rebels: Beetee and Gale, Katniss's lifelong friend. Previously, Gale had explained that the double bombs are designed to appeal to mankind's weakness for compassion.
Katniss comes close to crying, something she knows she mustn't do because it would indicate weakness to the other tributes and make her look vulnerable; thankfully, Haymitch distracts the crowd and the cameras by stumbling off stage.
She later realizes, after a conversation with the imprisoned President Snow, that President Alma Coin sent Prim to her death (which was caused by a hovercraft by the rebels) both to sway the Capitol citizens to Coin's side by making them think Snow was bombing the children, and to swing Katniss to her side through the ...
To put it short and simply, Prim's death is a message from Suzanne Collins telling us all that children can and do also die in war. In war, you can't protect even the most innocent and vulnerable because war and destruction don't discriminate.
He has betrayed her and is betraying all of District 12 by buddying up with the Careers, whom she calls the "Capitol's lapdogs." She decides that if the Careers don't kill him, she'd be more than happy to. Then, she wonders why Peeta hasn't told them about her bow and arrow skills yet.
Although she will never know for sure, Katniss does recognize that she cannot be with Gale. She will never be able to forgive him for his idea — the parachute bombs — that killed Prim.
Gale does not marry anyone in The Hunger Games. He and Katniss talk about running away together and starting a new life in the wilderness, but they never officially marry.
In the end, Katniss and Gale grew apart, as many childhood friends and young loves do. She needed something different in her life, and with Gale's link to Primrose's death, Katniss found a reason to cut ties. If Katniss ever wanted to find comfort again, she knew she had to return to Peeta for the long term.
Katniss is acquitted of murder by reason of insanity and sent home to District 12, while her mother leaves for District 4 and Gale for District 2. Other District 12 natives later return, including Peeta, who has recovered his memories and his love for Katniss.
During the supposed execution of Snow, she instead shoots Coin, due to her being responsible for Prim's death. She then attempts to kill herself with the suicide pill attached to her uniform, but Peeta stops her.
Snow can't stand to see a young woman betray a young man's affection—his view of what happened 65 years ago. And so he takes out his old, festering wound on Katniss.
Even though Katniss didn't kill President Snow, the public killed him in the confusion of the aftermath of President Coin's death. This led to the deaths of both ruthless leaders by the end of the series.
