seems laughable, as they don't really have any income (don't say anything about collection plates or donations you are a surely a troll and we can lock up the thread). furthermore, the land that they are on is not zoned for commercial or industrial activity.
it's a place of worship, not a business.
there are more exempt property types than you can possibly imagine, trust me on that laddy, i've worked in assessment for a decade.
if you're going to go after places of worship ("churches" isn't broad enough of a term in this case, you must include all places of worship - mosques, shrines, temples etc), what's next? parks? cemeteries? why don't we just tax homeless shelters?
a clue. get one. i have a feeling you're just pulling the ole religious troll anyway, but i decided to give you the time of day. it's STFU time.