The fact is all churches run on donations from individuals. The solution to killing these churches is to cut off the money. Easy enough, right?
The real problem I see is religious charities. Most of these organizations do some good around the world, but the problem is that they use this as an excuse to try to convert ignorant populations. So in the future when you see an ad for something like the Christian children's fund go online and find a reputable secular organization that does something similar. Then at least all the money will go to feeding and educating children and not to converting and preaching to them.