Don't let feelings consume you. Unprocessed and unchecked feelings led to this awful thing that happened. Don't let them spread onto you and by extension your family. How you feel has direct effect on your whole family, child included. Just ask yourself. Do you have same feelings for each child that lost his father that same day all over the world? No. for 99.99% you did not even hear of and if you did, you simply can not let yourself have same feelings for them all. It would consume you into nothingness, into someone that would be more like that shooter than Charlie. You are better than that. Way better. Feelings are good, it's not good if we do not have them, but if left unchecked, they destroy you from inside. You have people around yourself, talk to them.