You mean arguments like
freedom of movement and
equal rights for all humans are not substantial and rational?
'Multiculture promoters'
When people are free and its peace, there's always an exchange and mixture between cultures. And all cultures have common roots, we're all Africans. Discriminating ideologies are as ethically unsustainable as praising mono-cultures is also rationally nonsense.
Right wing people are just so simple-minded, they cant help themselves otherwise than finding someone to blame for all they dont like and fear.