This seems to have moved on a bit, so maybe I can come back in now without repeating myself. We'll see.
I agree with those people who say that the real issue is to push up standards across all schools - that is another debate. And yet another debate is how realistic it is to do so (all this highly suspect "excellence" we are seeing spoken of in some councils' literature clearly indicates, in the face of the evidence to the contrary, that they feel they are already doing so). What frustrates some teachers is that they work their socks off and their school is still flagged by Ofsted as being "below average" - because someone, by definition, has to be.
The faith thing is seen by some as a way of short-circuiting the path to a "good" school. A lot of people will have no interest in raising standards across the board as long as this remains available as an easy option - in their eyes, why should they?
The question of tax and funding is one on which people often seem to miss the point. My local council's services are, in theory, available to everyone. Yes, even maternity care - I don't feel it excluded me by gender, as it included our family through DW. (I'm surprised, especially on here, to see it implied that maternity care is something men should not feel a part of.) Should I have an accident or a disability in the future, or have a child who has one, I know that there is provision there. I'm a non-driver, but I feel I have a stake in the road system - I'm a cyclist and a pedestrian, after all, and I travel in other people's cars from time to time. And arguing that lack of "intelligence" means some people are excluded from the availability of further and higher education provision is daft - you may as well argue that the existence of excellent bricklaying courses at the local FE college excludes me as I have neither the talent nor the inclination to become a bricklayer. But if one of my children does, I'll know where to send them.
None of this is in any way, shape or form comparable with assigning real or putative "faith" criteria to school admission policies, for all the reasons I have outlined before. If my local primary school was a faith school - which is the postion a lot of people are in - the only way I could send my child there would be to lie, or somehow acquire the services of a nebulous, unproveable thing called "God" which I have no desire or need to believe in. My taxes fund these schools, as do the taxes of the religious. This situation therefore limits choice for vast swathes of the population, and in some areas offers it only on the basis of a thing which can neither be proved, tested nor demonstrated to be relevant.
There. Not so difficult, is it?