Because everything looks like one.
Examples
One Religion Is Enough.
(The Honorable John)
If the IPCC is dogma, then count me in as a heretic {1}.
(Judge Judy)
Objections and Replies
(Belief) Talk of belief shows it’s a religious test around the Climate Cult—
☞ Alternatively, belief expresses an attitude we have regarding stuff.
(Civilization) I must make a last stand to save Western Civilization—
☞ Try not to create a Crusade 5.0 while you do, shiny Armored One.
(Cult) Climate scientists form a cult—
☞ Pray tell more about the true science you presume.
(Dogma) The science has been overtaken by dogma—
☞ Citation needed.
(Likeness) The AGW war has all the overtones of a religious war.—
☞ From the hammer perspective, everything looks like a nail. From MC Hammer’s perspective, nothing can be touched. From all the hammers perspectives I know, everything is a nail one can’t touch {2}.
(Prophet) What about this prophet of doom—
☞ You’re begging #ButCAGW.
(Unproven) The terrible beauty of essentially unprovable religious beliefs—
☞ You mean, like the speed of light?
Notes
{1} Censorship. One variant of #ButReligion hints at censorship or mobbing: Salem, heresy, Luther, etc. The most famous form is of course #ButGalileo.
{2} Everything. There’s little easier than to compare something one does not like to a religion, at least when one hasn’t done any kind of religious studies. Everything is like a religion except religion, which is like a language game.
{} Manicheanism. The square can be used to whine about confrontation: blasphemy, creed, heresy, holiness, persecution, stigma, etc.
{} Millenarism. The square can appeal to #ButPredictions, e.g. prophecy, doom, etc.
{} Spychology. The square can offers a mind probe: bigotry, cult, dogma, fundamentalism, mass hysteria, zealotry, etc.
{} Toleration. The religious vocabulary has seeped in common usage: pontification, ex cathedra, etc.