Capt 104 ; the BFU unfortunately only reports the facts as reported by the DLH crew + data collected on the 747.
The Mexicans have another story, but not official yet, so difficult to argue their case .
I hesitate to post their version on the net .
Let's say that the interesting points to be looking for would be :
Did the MEX A320 received a heading and did not comply ?
Was the rate of decent of the A320 in excess of 4000 ft/min ?
Did the MEX A320 had its TCAs on ?
Was the actual minimum lateral distance in excess of 2NM ?
Was the 3rd aircrfat involved 1000ft above the 747 and what was his transponder ?
Was the holding full due Cbs over the field ?
From what I read, and if it is confirmed officially, the R/T reaction of the controller could be well justified.
But I find the remark of the Mexican ATC supervisor astonishing . I guess (hope ) some language / communication problems might be at the source of that statement.
As to the R/T, well in Mexico spanish is the official R/T language.
in any case the A320 was in another frequency, so the 747 would not have heard the original clearance, and should it had, and it had been in English, it would not have meant much to the 747 anyway.