In tennis, the top pros do this backwards stuff - Federer, Nadal, and perhaps others. Don't trust me on who, but more than one of them. There are videos on youtube. I haven't analyzed to see just when they do it, but to the extent I know, it isn't taken as you-are-a-****-player, disrespect city. Tennis can be tense and people want to mix it up, have some play, perhaps not in key tournaments. But some, for example, grunt, inexorably grunt, at large decibels, wherever they may be - I think Monica Seles started it, but not sure.
This could be considered purposeful distraction, and argued about.
Play is still an aspect of games. This coach may have extreme distaste for anything to do with rear ends, or he may be reflecting his culture together with the local game culture accurately - I don't know.