As he stood facing Burr, Hamilton aimed his pistol and then asked for a moment to put on spectacles. Hamilton, however, had already told confidants and made clear in valedictory letters that he intended to throw away his shot, possibly by purposefully shooting wide of Burr. ... In any case, Hamilton missed; Burr didn't.
Well one reason why they struggled was because the priest had higher authority than the king himself did but I don't really know why or how it lead to the crusades in the holy land. I'm sorry I couldn't help you fully but I tried.