כה תברכו את בני ישראל...ושמו את שמי על בני ישראל ואני אברכם
In the three pesukim of Bircas Kohanim, the Priestly Blessing, the Kohanim serve as the medium through which Hashem’s blessing reaches us. Hashem is the One Who blesses us via the conduit of the Kohen. Prior to offering the blessing, the Kohanim recite a berachah, “Who commands us to bless His People, Yisrael – b’ahavah, with love.” Thus, if the blessings are to achieve efficacy, the tenor of the relationship between kohen and congregation – and vice versa – must be one of love, no animus towards any member of the congregation for any reason. This applies to the flipside….