More disingenuousness. Translation: "You might have a point somewhere in there, so I'm not going to talk about it."
Translation: "Heck I don't know what they're talking about either, but damned if I'll admit it." What doe they mean? "It has broken every compact into which it has entered for our security." What compacts are they talking about and how has their security been harmed. And most importantly, what does this not have to do with slavery? As the the other, "It has given indubitable evidence of its design to ruin our agriculture, to prostrate our industrial pursuits and to destroy our social system," in retrospect that must have to do with opposition to slavery as well since they talk about agriculture and social system. So I'm down to one which needs explaining, if you can.