Thoughts on Jaime and Kingslaying

This is something that always puzzled me : why is everyone , literally everyone hates Jaime for what he did to king Aerys II? I have just re-read some Brienne's chapters where she meets some ordinary people and they say things like: "Jaime Lannister is an evil Kingslayer". Doesn't this seem to be a little unfair? I mean, killing the Mad King that was about to burn up the city was a good thing to do?



However, the cause-effect chain is quite interesting, and I think the answer for the universtal hate of Jaime is actually in the way the events unfolded.( Spoilers for A Feast for Crows )