Rabbi Wolpe nailed it. Don't add insult to injury by throwing around forgiveness verbiage like platitudes. Read his warning about Being Quick to Forgive the Tsarnaev brothers - and others.
Evil acts and senseless human death and injury are difficult for us to handle - we don't like living with the tension between right and wrong, good and evil or the painful reality that our living isn't neat, justice and pretty much of the time.
A mature faith can allow for this tension, without trying to erase it with casual comments like "I forgive the sinner but not the sin,," or "God will make it all right," or worse yet, "They are in a better place." Such positioning is an insult to the suffering of the victims and the complexities of the amazing world in which we live and the God of faith.