@Mike
I'd like first of all to point out that though I'm from a religious background, I'm agnostic at best, and generally hold the view that God is something that's created out of people doing kind things to other people, personifying that kindness isn't necessarily a good thing. That's just what I believe, in a VERY brief overview, although as with all things spiritual, it's rather more complex than that. All you have to know is that whilst I have a family with a strong belief in the big beardy, I defininitely do not have such a belief.
I don't think it is so hard to fill a void with such dogma. Look at the IRA, Basque seperatists, Baader Meinhof, the war in Iraq, the war in Afghanistan, the war in the Falklands, the war in Vietnam, and look at the core motivations behind them. 25% of terrorist acts are comitted by Islamic Fundies, the majority are comitted by people wth political perspectives. The IRA is a particularly good one, in that it operates the same way as indoctrinated religion, targetting the young and unfulfilled, and filling them for hate for something through ideology. There's a religious element, but it can't be denied that the republican cause is motivated by political means. There was always exactly the same power of motivation as in religiously motivated violence (the fact that they didn't blow THEMSELVES up can be put down to intelligence). World religions always condemn acts of violence as soon as they have the chance if their religion is named as the cause. For an even better example, just look at how easily Hitler motivated the Germans, purely based on fear of recession and scapegoating of the Jews, it had nothing to do with religion, and it's by far the biggest war we've faced. Religion isn't a motivation for violence, extreme belief is, but that can be a belief in anything.
I honestly think Mother Theresa had good intentions, whilst her homes are terrible, is it true that a well meaning atheist who setup similar homes might not end up with the same situation? I think not.
Condom use, Catholic church. Personally I think putting all that power in front of one man is dangerous, as was shown clearly in the Crusades. However, if you follow the tenets of Catholicism you won't have sex till you're married, so why's condom use a problem? If you break one why not break the other? Pro choice is a difficult one. I find it very difficult to just treat a human baby, at whatever stage, as just an embryo. Put it this way, I would cry if my wife had a miscarriage. What's a valid reason for abortion over adoption? I know not everyone feels the same way about things like that as me, and that's their option. If it's legal you can do it, if you're a good Catholic maybe you won't, but once again that's a Catholic thing.
Preventable cervical cancer. If I remember rightly that's a single school, and the Catholic church (again) didn't have much to say on the matter other than "that's their choice". If the parents think it's a good idea they can take their kids to the family doctor. I don't agree with the school btw.
Christian Aid don't have an agenda behind them either, they exist to offer aid, they just do it with the backing of church communities. Put it this way, from just googling a charity I remember hearing about when I was younger, think how many people with HIV Tearfund could provide ARVs to with 10k. That's 20 years longer to live for every person treated properly with it..
I don't necessarily agree with the idea of using church funds to put adverts on the sides of buses (especially considering I have a fair idea of the terrible wages ministers get while on call 24/7), but if you really wanted to make a difference, or balance out the evil in the world (I say in the world, as I don't think religion is realistically behind the evils in the world), how about giving some money that could actually save someone's life?