User blog comment:The Pro-Wrestler/Pure Good Proposal: Po (Kung Fu Panda)/@comment-32725786-20191019160436/@comment-43941699-20191019165436

To be fair, Po did try to explain to Tai Lung (who found the Dragon Scroll to be blank) about how things are special when they are believed to be, considering how his adoptive father told that his noodle soup's secret ingredient is "nothing", but Tai Lung didn't listen and insists on trying to fight Po for the scroll anyway, leading Po to go a step further by eventually ska-dooshing him. In the second movie, he offers Shen another chance by explaining that what happened in the past no longer matters and tried to help him move forward, but Shen is still hell-bent on killing Po. Po doesn't directly kill Shen, the ropes that supported the big cannon was cut during their scuffle, mostly by Shen, who wielded sharp blades; The peacock was too focused on killing Po that he unintentionally caused his own death, Shen accepts his fate. Po was only showing mercy to these villains as his first step and trying to help them see the errors of their ways, but they try to backstab him, provoking the panda to take this measure; this was self-defense and the last resort.