Not that I particularly care if churches are or are not taxed but arguing that religion is philosophy just is empirically wrong. Philosophy is rarely passed generation to generation but religion is almost always is. No one would call an 8 year old a Hegellian but they would grasp the idea that the 8 year old is Muslim and should be given hallel food. A Marxist solider who dies in combat isn’t going to get a Marxist funeral. A Platoist is not going to request a Platoist leader to provide them comfort in their final moments. No one is bringing their family to weekly Russellian services where they sing about the glory of set theory. No desperate person has begged their local Utilitarian thinker to pray away the Utility Monster.