What should I do with my uncle who reads about horoscopes in my house and believes in them, knowing that this is impermissible, and should I turn a blind eye to it and let him associate partners with Allah in my house, or should I prevent him, with the possibility of him getting angry?

The horoscopes prevalent in magazines, which claim to foretell human fortune, are a form of divination (kahānah), and it is not permissible to read or believe them. For whoever goes to a diviner or a soothsayer and believes what he says has disbelieved in what was revealed to Muhammad, because believing in them is an act of disbelief in what was revealed to the Prophet, peace and blessings be upon him, for Allah alone knows the unseen. Reading them without believing them falls under the category of consulting soothsayers and diviners, and whoever goes to a diviner and asks him about something, his prayer will not be accepted for forty nights. Therefore, one must advise him and forbid him from doing so, and prevent him if he does not heed the advice.