It completely does not make sense, whether Europe does it nor not. It would be objectionable if USA fans came dressed as INS agents to the game. It's a whole other level of insensitivity to invoke the image of someone who is seen as largely responsible for the deaths of 3,000 innocents.
I mean, how would a team from a Muslim nation feel if the opposing team were wearing Slobodan Milosevic masks? That's beyond funny and even tasteless...