Speaking to the camera, the terrorist warned:
"We swear by almighty Allah we will never stop fighting you."
He just wanted to start a riot. Asked by the woman who courageously rushed to help the downed soldier, why he killed the man, the crazed Muslim pretty much explained he was avenging the deaths of Muslims killed by British troops elsewhere - particularly Afghanistan.
The soldier was beheaded.
The Crescat posted the story and shared her thoughts on it here.
Since I can't comment on Patheos sites, my link is my comment.