[Verbal]

You can't refuse to do your job because you don' t like your 'customers' politics. Where will it end?

Paramedics refusing to treat a heart attack victim because his Uncle is a white supremacist?

If you're being paid to do a job then you have to do it, regardless. The Assistant is out of order.

Selfridges or any other place of business is not a place to air your views.