How people treats a begger

When I go for tea or to have lunch in the middle of the day, most of the shopkeepers do not allow me to sit in their shops. They always say vulgar things to me. They tell me, “go away from here; you are not supposed to sit in our shop”. But I really don’t understand why they behave so poorly. I am a worker with dignity who works so hard to feed his family. I am not a thief!