Frederick knew that his son's rash actions could ruin everything that he had worked so hard for. He quickly grabbed Raisman's arm and pulled him back onto the couch before he could attack Zach. He knew that eliminating all possibilities of cooperation with Zach at this moment would be a grave mistake. He needed to keep his options open and wait for the right opportunity to strike.
"No matter what, you should know that YOU are the one at fault here. The engagement had already been agreed upon by the families before you came here." Frederick highlighted the crux of the whole situation as he didn't like how Zach pushed the importance of the engagement to the bottom.