@ Mr. Optimistic: So far as the evidence thus far - strong and gusty winds, which likely made it impossible (or at least very difficult) to achieve a "Stabilized" approach (speed stable, guidance needles centered, etc.) at the required point(s) (500/1000 feet above ground).
Doing a go-around because the approach "goes wrong" is (or should be) a routine procedure. And indeed this crew did one with no problem. The question is, what caused the second GA to deteriorate into a crash?