Salam
This is a hadith that is famous and well known but I'm not sure if it was discussed in SC
Allah said in his book that the love of Ahlulbayt is obligation and reward to the prophet messengership (review the verse of mawaddah) while all other previous prophets said to their nations that " we ask you for no reward for this guidance we brought you, our reward is from Allah", our prophet said " I ask you for no reward except the love of my household"
This indicates, for shia, that the love of Ahlulbayt is associated with religious value instead of simply being love to biological bloodline . In the same time, associating a religious love with blood line made many question or get confused or deny any special place for this blood line simply because of its blood relation.
So the prophet announced that if someone found in himself that he cannot love ahlulbayt then he did not believe in the prophet's message because the love of Ahlulbayt is part of it.
يا علي لا يحبك الا مؤمن و لا يبغضك الا منافق