I'm talking about Hindu holidays like Holi or allowing different meals schedules and curfew during Ramadan. This idea lead me down a rabbit hole due to wondering about how purebloods would think about this. Here is my completely not based in canon thoughts. Again, none of this is canon, just amused me.

It's not due to inclusion. Bigots like Lucius would gladly deny people different than him things. However, with the acknowledgement of magic came a firm belief in Pascal's Wager. For example, with their French aristocratic background the Malfoys are catholic. However, most wizards are only comfortably sure of their religion about like, 80%. And due to fear of retribution, they refuse to mess with other religions and will accommodate them as much as possible. Because nothing is worth potential consequences from whatever is in charge of magic.

Even Voldemort couldn't get his death eaters to raid a church, mosque or temple, even one filled with muggleborns. Godrics hollow was chosen by the Potters instead of Potter Manor because a Fidelis in the middle of nowhere can be circumvented by someone who knows the general area using fiendfyre. However with their house so close to a church one side, and little mosque on the other, their enemies wouldn't dare. They would try hiding inside a church but at a certain point that's considered sacrilege and they could be attacked. So just one close by is best protection, plus a great place to run to.