to answer your question... people are haters because they lack internal ojects..

Look up object relations theory...

when people don't have normal internal objects they are forced to develop objects that are largely narccisstic in nature, hate is a false object created by those who lack healthy internal objects...

without internal objects, the ego cannot develop normally, so those with false internal objecs, have deficits in terms of ego strengths and are prone to identify with those groups that are condemnatory, which is really a projection of their own internal emotional conflict...