I never claimed there was, but there are central tenets held by most Christians throughout history.
True enough, but they have tended not to extent much further than 'we should do what Jesus said we should' and 'sin is bad'. Until the nineteenth century or so we can add 'God is scary'. I am guilty of gross oversimplification, obviously. The emphasis being on most Christians, because that implies the religion of the people; and, eventually, the culture of the people. At an intellectual level things were/are quite different, but you must understand that only a tiny minority of the population at any time have ever had much interest in theology.
I think we can be fairly certain that slavery is not one of the central tenants of Christianity.
I wouldn't really characterise that particular intellectual... er... movement or set of movements... in that way. It's true that much of it was a reaction against overtly Christian forms of thought and so on (and so was obviously less christian than older intellectual tendencies and, of course, wider society), but it still operated within cultures and societies that were fundamentally Christian in many respects. Even were this not true, the thinkers of the Enlightenment were not exactly very influential outside a relatively small elite.
Probably the best way to explain my point is to move onto a different topic. Anti-colonial writers almost always wrote in the language of the colonial master of their native country, were almost always educated in the systems of said colonial master and were influenced by works written by various Western authors and political activists. The obvious problems there are, more or less, what I'm trying to get at in this case.
Disagree entirely, I'm afraid.