I wish people could respect one another

Why do people hate others? It has always confused me and I just don't see why we can't get along no matter race, gender, sexual orientation and disability someone is. I know that it may never happen but in a perfect world I could. Then we would all help each other instead of taking and not doing anything return. Again, in my world, people would share ideas and provide for their community with things such as food, shelter, education and most importantly...togetherness.