From what’s been presented to me, they sound like a bunch of quacks – making very extreme and untestable claims. This does not mean, however, that they’re simply wrong.
Our society has also evolved through the winnowing of the memes (ideas) that make up our society. Much as you frequently find the frequency of some genes having a strong correlation with other ones, you’d predict that some memes would have a strong correlation with others.
If sociobiologists just applied thier thoughts to memes instead of genes… they might find a lot more testable theories.