It is never acceptable to make racist remarks. Whatever people think is their own business I guess, but it is never acceptable to make remarks, or behave in a vile manner towards towards those of a different race/religion, or those of your own race/religion for that matter. I also believe it is not acceptable to make comments regarding what a person in the referendum voted, I voted remain, but would not make any comment to anyone else about their vote. I'm not sure the Brexit vote has increased racism, I think it more likely the horrible news 're Syria, Nice, refugees, and now even Turkey, may have more to do with it, but I'm prepared for others to disagree with me.