What is the ruling on eating and drinking food and beverages offered by pagans (Hindus) during their celebrations, and what is the ruling on intermingling with them in this matter?

It is not permissible for a Muslim to attend the festivals and religious occasions of the disbelievers, as this implies an acknowledgment and affirmation of their rituals, which are connected to their corrupt beliefs. It is also not permissible to eat what a Hindu slaughters, because they are not People of the Book.