It is a common thing for people to be skeptical of religions other than their own. Christians are atheists when it comes to believing in Vishnu. Muslims are happy to cast Buddhists as infidels. Neo-Pagans hug their mother goddess but spare no love for the Christian god Jesus.
It is much more rare for people to be skeptical of religion categorically. Yet, the Irregular Heresies collection comes close to this skeptical idea. They’re not out merely to promote their own gods over someone else’s. They’re skeptical and satirical of all divine beings and theologies – and skewer faith of all varieties, with verbal violence only, on a collection of heretical bumper stickers.
They’re mocking Jesus – Jesus, Schmeesus.
They’re profane for the Hindus and Buddhists too, singing Brahma Lama Ding Dong and declaring that Ganesha works for peanuts. Be Here Now, Bucko is the closest they get to Enlightenment.
They are infidels to Islam’s self-seriousness as well, challenging, Fatwa This!
My favorite strikes at the root of monotheism: Zoroaster Was A Disaster.
One bumper sticker sums up this perspective: Your sacred cow is my hamburger. No one entitled to expect that everyone else will show reverence for their supernatural beliefs. People will disagree with you. Pray on that for a while.