Prejudism extends beyonds skin colour

Being prejudice and judgemental can extend far beyond the colour of people skin. I am from Liverpool and recently I went to a supper at someone's house. When I walked in one of the guys, who clearly thought he was funny, said ' here she is, lock up your handbags ladies and keep your eye on them'. He clearly though that as I was from Liverpool then I must have also been a thief. I also remember a friend, who was a little overweight, was told (not so long ago) that she wasn't successful in her job application as a receptionist as she was 'too heavy'. Why is the human race like this. Does it matter, what colour people are, how they speak, where they live or what they look like?.