Lol. Man United club shop throws major shade at Van Gaal with this Adidas merchandise on sale

Louis van Gaal has been criticized for his style of approach, with everybody affiliated to the club in one way or the other insisting he brings back the flair and attack that Sir Alex Ferguson used to be known to use.
In fact fans at Old Trafford are regularly heard screaming "attack, attack, attack" at the players during games. Now the club's shop have joined in to take a pop at him with these t-shirts and hoodies on sale with the message: "Duty to entertain".

Is Adidas out of line to have designed those?