Well, the problem Pop is that no one is calling them "evil" because of their world-view, or because they disagree with us. Others accuse them of being con-men because of how they are presenting evidence, and how they are using terms erroneously to deceive readers, such as "peer-reviewed".
Accusing AiG or similar sources of being corrupted, is no different than calling the media bias, or the government corrupt, it is the nature of their entity that allows them to be criticized the way they are, even though they are not "here" to defend themselves. I can accuse George Bush of using evangelical christians, should someone then tell me I can't say that because George bush is not here to defend himself?
But as others have said, if you are going to accuse AiG and similar sources of such things, then you are required to provide support, and we can see if it is a fair accusation or not. But you can't afford AiG, the Media, the Government some special liberty to not be criticized because they are not here to defend themselves, as we would for each other.