The great Boojum, of course.

Boojum - (aka Boojum-Under-The-Rock) is the One True God(tm), all other
gods are utterly false, and all other religions are crap.
Followers of the One True Way(tm) - known variously as Boojumites,
Boojumists, Boojutics, or by many other names - believe that the World
(As We Know It) was created in 1934 (on April 1st at 9am, to be exact)
when Boojum "uurped wisely in the slime" to create the first "humorans"
(humans). Previously the world had been chiefly inhabited by Trolls,
whom Boojum banished beneath the Earth. One day, probably in the
future, Earth's surface will crack and the Trolls will pour out to
again take over the world, an event called the Great Rupture. At that
time, all people who have not "found Boojum" will become eternal Troll
slaves, and made to wear leisure suits, drink American beer, and suffer
other horrors too foul to contemplate.

Meanwhile, there are signs and portents. Chief among these is the
flamingo, especially the pink plastic lawn flamingo, which is a symbol
of Boojumite Sainthood. Who is a Boojumite Saint? Golly, who isn't?
This great honor has been bestowed on many people, whose gratitude is
best expressed in this quote from St. DogMeat, "Thanks for the gum
ball, Mickey!" There are also Mega-Saints, who are akin to 33rd Degree
Masons in that they hold all the Keys to Knowledge and Secretly Control
the World!

Many famous religious leaders, over the course of history, have seen
the light and been converted to The Truth of Boojum(tm). Usually, this
revelation prompts them to write a book repudiating their previous
beliefs - and tragically, the book's publication usually prompts the
convertee's former followers to murder the convertee, to prevent the
total collapse of what had been to that time a major religion. Many of
these (in)famous books share similar titles, such as: TAO IS CRAP by
Lao Tze; BUDDHISM IS CRAP by Siddhartha Guatama; ISLAM IS CRAP by
Mohammed; THELEMA IS CRAP, by Aleister Crowley; ATHEISM IS CRAP By
Madeline Murray O'Hare; and most recently, SATANISM IS CRAP by Anton
LaVey, who was tragically "bumped off" earlier this year (by the use of
a subtle poison which induced a "heart attack"). There is even rumored
to be a volume entitled BOOJUMISM IS CRAP, but its existence has not
been verified (though rest assured, if it does exist, its author will
be "dealt with" in the usual manner!).

The Holy Book of Boojumism, known as the Booble, has never been
completely written down, but instead is accessed extemporaneously by
channelling Boojum. Thus it is ever-changing, seemingly at the whim of
the individual, but eternally the Word of Boojum Himself. There are
those among the unbelievers - probably Trollist Agents! - who claim
that Boojumites "make it up as they go along" and in fact that the
entire religion is nothing but an offshoot of Discordianism, and an
inane parody of every other religion... but these poor fools are short-
sighted indeed, to limit their accusations in such a manner, for in
Truth(tm), Boojumites make fun of EVERYTHING. And yet, at the core,
there is an essence of... solidity. Boojum is real! Boojumism "works if
you work it" (as the saying goes).
Witten by Benjum, Prophet of Boojum

But not until after they're finished eating dry underbrush in
what I thought was a rather amusing attempt to control wildfires.