There is nothing good in multi-culturalism because there is no value in ANY culture. The word simply means a state of blind acceptance of traditions. No culture has ANY merit, every culture binds humans in a prison made up of old and silly beliefs and values.
Humans have a single purpose to their lives - conscious evolution and self-realisation. We are born blank, open...then our family, friends and society "program" us full of culture/tradition...we lose our individuality, our essence is swamped by a false personality...our purpose is a second education, to break the chains of our culture/tradition...to be REAL...genuine, thinking beings.