We can be guilty about anything. It is a state of our mind. Once someone gets into this mode, it becomes difficult for them to make a concrete decision. The externals supersede them. It can come from emotions, insecurity, and fear.
Think yourself about the number of times you have fallen trap of it. Your loved ones, parents, and your government try to pull this stunt on you. They will justify their opinion and make you believe your actions are wrong. You will be guilt-shamed and fall victim to the ploy.
Psychopaths, dictators, religious gurus, and manipulators know well how to invoke one’s guilt mode and make them do things they want.