A person with prejudices believes in their reactive and negative impressions of a group of people as the truth of those people.

Listen to see if the person expresses a view that shows a whisper of empathy.

Ask appreciative questions about their empathy

Do not express views opposite to the one who is intolerant/prejudiced/sexist/anti-refugee/anti-Muslim/racist etc. You will intensify the views of other. Instead ask lots of questions.

Your eyes do not leave the eyes of the other. Your voice is lower than normal.

If you argue, you will reinforce the self-righteousness of the other.

Never raise the voice or speed up speech. This will increase their levels of intolerance.

Do not interrupt the stream of prejudice.

The person will run out of words.

Stay very still and upright.

Remember to keep all your questions short and to the point. Do not waste a word or a sentence. Do not explain your position. You are only interested in their views.

Your departure  may leave the person with prejudices engaging in reflection on their own attitude.