Paul W. answered 04/28/19
Dedicated to Achieving Student Success in History, Government, Culture
Nope, you're not missing anything. You are entirely correct in your understanding that, regarding a religious Faith that includes one or more supreme beings (gods), the way the supreme being(s) supposedly wants humans to behave is, within the given Faith system, 'Good.' Conversely, the human behavior that the supreme being(s) supposedly disapproves of is, within the given Faith system, 'Bad.'
While it's true that, within a given Faith system, the supreme being may supposedly spell out specific rules for the behavior of human beings to follow, that same supreme being, as the author of said rules, is free to violate said rules or instruct humans to violate said rules because the supreme being, according to the teachings of the religion in question, is perfect and / or all powerful. The supreme being is incapable of doing 'Wrong / acting Bad' due to his perfect nature and / or is above following rules due to his limitless power.
In short, within a given religion that involves the existence of one or more supreme beings, there is no 'Good' or 'Bad' independent of the supposed wishes of the supreme being(s), as interpreted - conveniently - by the leaders of said religion.