Question: why did ygritte kill jon snow?
Answer: Yet, somehow, Ygritte finds him!!! Ygritte told Jon, "you are going to be loyal to your woman" and he agreed. ... This was the dying wish of Qhorin Halfhand, and Jon saw it through. When Jon refused to kill an innocent man in order to prove that he was indeed one of "them" (a wildling), they tried to kill him.