“Learn Arabic, for it is part of your religion; and learn the laws of inheritance, for they too are part of your religion.”
What ʿUmar, may Allah be pleased with him, enjoined—mastery of Arabic and mastery of the Sacred Law—covers everything a Muslim needs, for the religion consists of words and deeds. Proficiency in Arabic is the pathway to understanding its words, and proficiency in the Sunnah is the pathway to understanding its deeds.
Prohibition of Imitating Them in Their Festivals (by Legal Consideration)
When we examine the matter of festivals, several considerations arise:
First: Festivals form part of the revealed law, the avenues of worship, and the rites about which Allah, Exalted is He, says, “For every nation We have appointed a rite which they observe” (al-Ḥajj 67). They are like the qiblah, prayer, and fasting; therefore, joining non-Muslims in their festival is no different from joining them in any other act that defines their religion. To agree with them in the entirety of their festival is to agree with them in unbelief, and to agree with them in some of its offshoots is to agree with them in certain branches of unbelief.
Indeed, festivals are among the most distinctive features that differentiate religions and the most evident of their public symbols. Imitating them in this respect means imitating them in the most characteristic rites of unbelief and its clearest symbols. There is no doubt that such imitation may, under its requisite conditions, ultimately lead to unbelief as a whole.