On my daily dog walks at the park (Essex) I regularly talk to:
Muslim lady from Manchester who has a dog called Gizmo - She's a locum doctor.
Lady who was born in India but grew up in Saudi Arabia who has a dog called Olive - She's a primary school teacher
A lady from Texas who has an Australian Shepherd - Can't remember that dogs name.
A Hungarian couple who have 2 Vizslas.
I don't know where you think multiculturalism is failing - Maybe go and talk to people?
Yea I have a black friend to.