What binds the ruling class together, regardless of their professed politics, is the continuation of the capitalist order that grants them wealth and power. What explains everything they do, are the monstrous actions necessary to keep doing that as limitations are reached and exceeded. All the violence, all the reorganization of society, all the propaganda points to the same place "fuck you, we won't stop even if it kills ever last one of you; in fact, we're planning for that."