Shiurim in this topic
It is a fundamental principle in Jewish thought, particularly emphasized in Chassidic teachings. Ahavat Yisrael is rooted in the Torah commandment "ואהבת לרעך כמוך" ("And you shall love your fellow as yourself") from Leviticus 19:18. This concept teaches that just as one loves oneself unconditionally, so too should one love every fellow Jew unconditionally, regardless of their background or level of observance.
In Chassidic philosophy, particularly within Chabad teachings, Ahavat Yisrael is seen as a reflection of the intrinsic unity of all Jewish souls, which are all part of a single, greater soul. The Alter Rebbe, in his Tanya, explains that since all Jewish souls are connected and originate from the same divine source, loving another Jew is akin to loving oneself.
Ahavat Yisrael is not only about feelings but also about action—helping others, being sensitive to their needs, and fostering unity within the Jewish community.