Why did Jaime kill mad king?

Related questions

1. How old are the stark siblings in Season 7?
2. Did Benjen Stark die?
3. Do the wildlings take Castle Black?
4. Will Daenerys marry Jon?
5. Why does tommen die?
6. What is a Varg?
7. What is Jon Snow's real name?
8. Who created the night king?
9. Does Arya become a faceless man?
10. Who killed rhaegar Targaryen?

Tags

1. #baratheon
2. #targaryen
3. #virtue
4. #marriage
5. #swordsman
6. #greatest
7. #kingslayer
8. #killed
9. #robert
10. #cersei
11. #westeros
12. #derisively
13. #kingdom
14. #queen
15. #sometimes
16. #because
17. #aerys
18. #perhaps
19. #throne
20. #called
21. #jaime