Why did ranga forgive the three boys ?? After all hey betrayed him and wanted to kill him ??

Just finished watching Avesham hindi dub , and oh my god !!!!!

Completely hooked to the movie

So so good , doesn't feel boring or stretched even though 150min long

So my question for movie experts here is why ranga , a fierce killer , who killed his own brother , slashed his fighter mustache guy in the back and killed his 2 loyal members/fighters . Forgave the three guys after all the bullshit they did ??

What changed ranga's mind so much all of a sudden . I failed to understand the reason ???

Pls help I can't sleep , this question is eating me from inside and making me restless....