Don't think the KLM even made an approach, and certainly no go-around. He was in sequence (exactly where not revealed) when ATC advised YYZ closed due to the crash, so KLM immediately issued 'Pan' and diverted to SYR.
Reported that ATC offered YHM (Hamilton) which didn't make a lot of sense given that the worst WX was between YYZ and YHM, unless a wide arc over the lake was flown.