What is it you think morality or ethics are based on? Without feelings there is no moratlly. People think it’s immoral to kill because of how it makes them and the people connected to the person who was killed feel. People think theft is wrong because of how they feel after they have been robbed.
And again this has nothing to do with this case. The premise of saying feelings don’t matter is a flawed one as moral ethics's laws and society as a whole have been based on feelings. As an individual you can follow your feeling and get revenge after a crime but society as a whole has deemed that they feel they don’t want people like that on the streets so you are going to go to jail because of it.