I can, and have had to, avoid Brexit conversations with those people I know who voted for leaving, although it is getting harder as the approaching catastrophe gets nearer, but I do accept that they made their decision, as did I, after evaluating and deciding what was best. But, racism is never ever acceptable and I would not be prepared to stay friends wit someone whose life views are so different to my own. By not calling her out on her views, by continuing to be 'friends' with this person you are accepting and thus condoning her vile views.