Why did Jon kill ygritte?

Related questions

1. Does ygritte come back?
2. Did ygritte love Jon?
3. Will ygritte come back?
4. What did Ned Stark say before his death?
5. What does ygritte say when she died?
6. Was ygritte Tormund's daughter?
7. Why did they kill off Ned Stark?
8. Does ygritte betray Jon Snow?
9. Why did they say Jon Snow was a traitor?
10. Why was ygritte mad at Jon Snow?

Tags

1. #attacks
2. #ygritte
3. #battle
4. #first
5. #wildlings
6. #finds
7. #killed
8. #books
9. #arrow
10. #night
11. #watch
12. #there
13. #dying
14. #random
15. #castle
16. #attack
17. #wound
18. #presumably
19. #separate
20. #black
21. #against