No body is "cheering" anyone's death. We are merely amused by the irony of this person's demise. If this person was Canadian, Italian, English or several other nationalities this thread may not exist or would likely have another sentiment.
But when the individual who died in this fashion has an agenda to use the very freedoms provided by Americans, to destroy Americas way of life; some of us have a hard time showing empathy.
"There is no greater tyranny than that which is perpetrated under the shield of the law and in the name of justice. -Charles de Secondat"