I genuinely think they are mentally shot because of his pace and intent. Not his death stare following a length ball outside off. Also think his huge improvement in control has been key. I just find the staring and constant mouthing off unbelievably tedious. You'd all hate it if it was a player from another team.
Of course mate.
Poms give to Salve as much as we give it to Jimmy/Broad for their carry on. But that's Cricket/sport and the nature of following teams.
However, some players tend to back up their theatrics with their performances more so than their opponents.
Either way, singling out Slave for his stare downs is drawing a long bow. Fast bowlers have been doing it for yonks. Whether its put on, over-done or not, its nothing out of the ordinary.
And certainly not worthy of being categorised as unsportsmanlike IMO.