Because right-wingers are EXTREMELY, overwhelmingly, almost unanimously corrupt. They would never punish one of their own, no matter heinous, unethical, or repugnant the crime. They know that if they do not all stick together lock-step no matter what, their illegitimately stolen power will fall apart like used wet toiletpaper.
Because in reality its not Republicans vs Democrats. It’s Us against Them. They will never side with Us against one of their own. We exist to fill their coffers, we are necessary bugs in the system.