I don't think any of the actors actually believe in Danys ending. Like they are trying to save face but they know it's garbage. Most of the people I know enjoyed watching Cersei and the Lannisters be decimated - it wasn't something they were horrified at. The hamfisted attempt to make the Dany=Hitler=Bad connection nobody believes and pretty much everyone finds Jon stabbing her during the kiss completely revolting.
After the history that has been built up, kings landing just doesn't get much or any sympathy(nor should it). What ever D&D was trying to pull, they failed at it for most of the people I know.
The only way this could have been received without outrage is if Dany was about to launch an attack on the North(which we didn't get other than speech which hinted at the possibility and no time-table) and Jon can't talk her out of it, even the whole assassin stunt he does still doesn't work.