Why? If people act in a way that is contrary to the country in which they have chosen to live, choose to set up their own customs and prejudices, archaic religious practices, rather than adapt to what is the norm in their adopted country, why on earth should anyone objecting to that be called a bigot???
A bigot is someone with an unreasonable prejudice. There is nothing unreasonable in objecting to people who try to disturb and disrupt our previously peaceful way of life.