I don’t thinks it matters whether these events are rational or not. Rationality comes from the human mind. It comes when there is doubt that something is true or evem happened. A person rationalizes to feel comfortable with his wrong decision, to make him feel like he is right even though deep down he knows he is wrong. A person who says these events are not rational only sees things in black and white. He has tried (maybe subconsiously) to come up with some reason how such events have occured, but he is not able to, because there is no reason that is within the regular laws of nature for the occurence of these events, so he regards them as irrational.
This person will only accept these events as true if he trancends his rationality. One way is to accept the Torah, which describes these events, as divine.