What is the ruling of Islam on a father who belongs to a Sufi order, holds mawlids (celebrations of the Prophet's birthday), and venerates the dead, if he dies before the establishment of proof against him, and what are the consequent rulings pertaining to the family?

The Sufi orders today contain deviations, innovations (bid'ah), and superstitions that reach the level of creed (aqidah). Some of them invoke others besides Allah, seek help from the dead, and believe that their shaykhs can bring benefit or harm. They also have innovations in worship and superstitions. However, one who belongs to such an order is not ruled to be an apostate (kafir) unless proof (hujjah) is established against them, and the conditions are met, and the impediments are absent. This is because declaring someone an apostate is not a trivial matter and has immense consequences in this world and the hereafter. Therefore, a father who belongs to a Sufi order should be treated as a Muslim during his life and after his death. He should be advised to abandon Sufism and its shortcomings should be explained to him, while upholding filial piety, being kind to one's parents, and obeying them, except in disobedience to Allah.