Was it really a disloyal spirit that kept Mordecai from bowing to Haman? I don’t think so.
Mordecai was absolutely loyal and ready to do whatever it would take not only to show respect to the king and his officers but also to protect the king from any possible harm.
This was well demonstrated in the incident of Bigthana and Teresh, the two eunuchs (probably of Jewish background) who were angry with the king and wanted to kill him. Mordecai reported this to Esther, who then reported it to the king in the name of Mordecai.
When an investigation was carried out, it was found to be true and the two were executed. This was recorded in the chronicles. Who, then, could have been more loyal than Mordecai?
But when it came to worshiping Yahweh, Mordecai would not trade that for anything, even if it killed him. For this, he was willing to be disobedient. He would not bring himself to bow down to or worship the mortal being Haman, or an idol for that matter. This had nothing to do with loyalty to the king.
May we be people who will never worship any other being. Totally loyal and totally disobedient.