To some members of the EU, some mass murderers are somehow less meaningful than others.
In other words, the ones that their elders had to contend with are evil, the ones other Europeans had to suffer under arent - especially so if they are your ideological heros.
If dinosaur extremists keep using the Magen David next to swasticas and the hammer-and-sickle, will it have to be banned too? What will the protestor zombies turn to? The Greatful Dead dancing bears?