When I was younger (school age) if I noticed I disliked someone for no real reason (perhaps based on assumptions or mild jealously whatever it was) I would force myself to try to become friends with them. Getting to know them usually worked to overcome whatever was causing that feeling and better than that I’d often end up with a new friend.
My suggestion would be to find someone you assume you dislike and reach out in some way and try to find common ground. Like amiricanyeshivish pointed out just happened earlier in this thread.
Remember sinas chinam is a two way street. In my opinion it’s harder to hate someone you know and when there’s no “real reason” it should be easier than you might expect to overcome.
yungermanS – beautifully said!
provaxx – thanks for the stories 🙂
n0mesorah – “If you hate other Yiden because they lost their way, is there any place for them to come back to?” – *applause*