Dutch Model Abandoning Multiculturalism

Maybe it's a time that we considered abandoning multiculturalism.  For one thing it makes no sense and for another it has been empirically shown to be destructive of national unity.  It doesn't work and it's stupid, so what possible reason is there to support it.  The big question is why was it adopted in the first place.  Its proponents should be shown up for the knuckleheads they are.