Attacking the beliefs of individual people is simply not on. Challenging belief in appropriate contexts may well be. As an atheist (though atheism isn't a belief), I expect to be challenged if I display my atheism. When I'm challenged I'm not going to issue a fatwa against the challenger, have him excommunicated or wave heresy laws at him. Attacking organised religion is essential and it must be fearless. Organised religions have massive responsibilities to their captive adherents, but are notorious for falling down on those responsibilities. I would say that the biggest failure of organised religions is that they all lie to their people. The fundamental lie they tell is that the whole story on which the religion is predicated is the truth. Fundamental tenets, which fail the evidence test at every turn, are not to be questioned. That is terrible and it is dehumanising. It perverts and obstructs the amazing power of intellect that we are endowed with (by God, if you really must - which makes the intellectual stunting even more insulting, if you think about it: a God who gives us amazing brains that the bishops and imams then forbid us to use). Education is learning to acquire knowledge using our critical faculty. Seeking evidence and rejecting received wisdom is the default. Religion is anti-education. A whole bogus body of learning, called theology, has sprung up round religion. Within the bounds, you are allowed to feel that you can question and doubt and frown. But mind that razor wire round the edges.