But exactly a chabad minhag, but when I was in Cleveland for succos I davened in the chabad shul and I was highly impressed with the Ahavas Yisroel that was going on there.
I decided to look a bit more into that and I saw in the letters from the rebbe that at least 80% of his letters are talking about Ahavas Yisroel and achdus.
Way to go!
I almost converted right then and there.