South African crowds are brutal but English crowds were disgusting towards Steve Smith in 2019.I think that was the key to all this. South African crowds are brutal, much more so than England or Australia where there tends to be more underlying humour.
Warner had a tour of the crowd saying things about his Mrs, holding up signs, wearing Sonny Bill masks, and so on. The South African players also pull no punches when it comes to sledging.
I think it was as simple as he copped such a psychological barrage that he just snapped. Had a melt down and lost the plot trying to hit back at them, got to a younger team mate who worshipped him and out they went with the sandpaper.
The cognitive dissonance amongst fans (and players) of all stripes is hilarious when it comes to cheating. England won the 2005 Ashes thanks ball-tampering, yet Michael Vaughan wouldn't shut up about Australia cheating in Capetown. I guess he figured he'd hide in plain sight.
Ball-tampering has been going on forever. It is the inevitable consequence of lifeless pitches that are unfairly in favour of batsmen. Sarfraz, Imran, Akram, Waqar and their reverse swing got away with it for decades. Atherton rubbed dirt on the ball, etc.
Our blokes copped the harshest punishment by a mile of anyone who has even been done for ball-tampering. ICC punishment is one game, they got a year. They've paid a stiffer price than anyone, certainly more than those English heroes who used lozenges and mints instead of sandpaper and got MBEs instead of suspensions.
Produce fair pitches. Leave the flat tracks for pyjama cricket.