Judgement

Exodus 1:6-22
When I was young my mother taught me to cross over the road whenever I saw a men working beside the road, they were Irish. We lived in the very western tip of South Wales, many men came over from nearby Eire to find work and send a wage home. In Texas I carried on this wariness with Hispanic men hanging on corners.
What did I have against these people, especially the individual men? Absolutely nothing. I did not know of their violence or their kindness. I did not know if there were loving fathers and sons trying to eke out a living for their family back home.
Why do I group people together and jump to conclusions about the clan instead learning to know each person individually?