Try to give one candy to calm a child having a tantrum in a room full of them and see what happens when the other children realize that crying, breaking toys and banging the head on the wall equals to be rewarded with sweets.
You allow somebody to break the law and jump over the constitution just because they are inconsolable otherwise. You fell in the trap. Now you must grant the same treatment to the rest. Similar referendums were demanded (and should have to be allowed in the very next day) for Euskadi, Galicia, Canary Islands, Asturias, Leon, Andalucia and only god knows what more. Two can play this game, and ten also.
The idea is not Germany allowing or not a referendum for Bavaria; or UK trying to please Scottland; the idea would be: you must now be forced to grant referendums for each single state in Deutschland or UK to make us happy "or we will stop breathing (and will create a permanent state of confrontation and street disturbs)".