Not saying it makes any gloating at them justified OR people shouldn't gloat at them but they do make smart arsed comments/tweets and in a world where you can never delete stuff, people will cheerfully throw it back at you when things don't go to plan.
Delight in other people's misfortune. If only there was a word for that... maybe Germans can create one in their language?
Selling us Mkhitaryan.. "The paths of Borussia Dortmund midfielder Henrikh Mkhitaryan and (27) separate from this summer. After intensive discussions BVB have complied with the wishes of the Armenian national team member to join Manchester United – WHO FINISHED FIFTH IN THE PL LAST SEASON."
And... "Borussia Dortmund would like to wish HM all the best... in the PL AND THE EUROPA LEAGUE"
I can imagine there will be a few tweets on their official Twitter page wishing them well in the Europa League next season. What goes around, comes around? Fans take their club very seriously and if you take the piss (when they maybe could have been focussing on why "a player would rather leave us and play in the EL"), expect it back.
(Note to self.... diarise for May to tweet Dortmund).