[greglepore]

He was flying the RNAV. Not only is it a difficult circling approach but the runway in question is very marginal in length for a 767ER. It was in use due to the crosswinds gusting 30ish across the main runways, but that's within the limits of the 767ER. Pilot flying was likely trying to stick it right on the end of the runway and got a below glideslope.
Agree its almost certainly pilot error, beginning with accepting the runway 29 approach in the first place. Lots of pilots with type experience in that aircraft have commented on social media, for whatever that's worth, that he should have simply said "unable" and used the longer runway with the safer approach