Rodolphus was glad that they were choosing to fight, and not to flee. A fight meant he'd be justified in killing the brats that were with Potter, and perhaps that idiot Lovegood in the crossfire. His Lord only needed the boy, after all. The rest were only fodder, extra space, and watching them die would likely make Potter so sick with grief that the capture would be easier than it had proven to be in the past.
He cast the Crucio aimed for the Weasley brat at the same moment Arugs sent the table flying. Later, he would claim that the spell missed and sent Lovegood to his knees screaming in pain because of the table's force and debris.