I recently learned that Czar Nicholas II and his wife Alexandra were cousins with the royal families in England, Germany and other European nations. How could these other rulers let their cousins die in such brutal fashion? I understand that Czar Nicholas abdicated on his own free will - why did he not ensure that he or at least his family were protected?
While we are waiting for an answer, you might enjoy this older answers which touched on similar subjects:
Why did George V oppose asylum for Tsar Nicholas II? Did he regret it after the Tsar's murder? by /u/kieslowskifan