any reasonable person can understand why abbas would boycot any action by ben gvir no matter what .just as you dislike abbas (although he runs on a platform of working together with the jews on whatever we agree on) because you know he represents the muslim brotherhood afiliated Islamic Movement,so to you should understand why an arab would dislike ben gvir who is a proud kahane supporter.whatever you as a jew think about kahane and his movement dont expect an arab to like him.