That quote says no such thing.
It says if A is correlated with B, and B is correlated with C, then C can be expected to be correlated with A.
It says nothing at all about why A is correlated with C.
It is also fascinating that the author blows the "irresponsible scientific commentary" whistle but feels no need whatsoever to explain why what Murray said is either unscientific or irresponsible.
The study had the answer before it started. And it's ridiculous. But I'll bet they made some big bucks.