I do not support sending them on the express train to hell. I would look at what suffering they have caused and subject them to 10X before their death. The slower the better. Not because it changes the end conclusion, but it sends a message to those who may choose to follow.
Unfortunately, by God’s immutable rules of the soul, it also changes — to the worse — those who do it. The Old Testament did not prescribe torture deaths for a reason.
At some point, civilization is going to have to come to grips with this. We are going to have to plumb the depths of our own primal brutality. Nothing I would want to do, but it is something that we have to do. And for God’s sake, make sure that we do not spare the pork...