Not sure what you're asking? You've shown two correlations and you can't make the conclusion the way you did based on those two correlations. It's just how statistics works in our complex world. Perhaps if you can prove that only cholesterol affects CVD and nothing else. Good luck with that.

You'd need to study the relationship directly. Otherwise, your ignoring the whole range of effects that eating saturated fat may have that would counteract CVD. You're just picking one effect (cholesterol) and making invalid transition from that to correlation between saturated fat and CVD.