Debates over how many adherents one can justifiably excommunicate from the ranks is a privilege of the powerful religions. Smaller players, such as my own faith, have learned that such intra-sectarian squabbling gets downright dangerous when your numbers are already rather tiny (and the other guys are going for your head).
Certainly, lots of ultra-orthodox Jews think I really suck at being Jewish, and some more extreme sects would go further and label me a heretic. Fortunately for me, they're in the minority. But by and large, Judaism has learned that we must hang together to avoid hanging separately. The majority of Jewish denominations in America, for example, do not hold that the Bible is the literal word of God. But yet, somehow we don't engage in cannibalistic theological warfare to expel the unbelievers. It must get tiring after awhile, and it's energy I'd really rather expend elsewhere.
Via Southern Appeal. Hey, President Obama -- if you're no longer Christian, we're happy to take you in! We can bond over how annoying it is for really self-righteous people taking it upon themselves to pray for our immortal souls.