It is never good to have enemies. I don't believe that if you have them that equates you stood up for something or if you don't then you've lived an evasive life and lack character. The unfortunate reality is that people have enemies for absolutely no justifiable reason and sometimes even without their knowledge.
You cannot control how others think and their state of mind.You only have the power over your thoughts, emotions and actions. You could be the kindest, sweetest, most unselfish person on the Earth and there may be someone who can’t stand you because of their individual mind set.
This is exactly what racism, classism, sexism, and so on is – not liking someone, even hating someone and treating them inhumanely, solely because of their race, class, sex, and so on...and not for any justifiable reason.