Dear Behnam and Elham,
Many rules that we consider them as Islamic rules are common among people of the world , for example ,not telling lie , calumny (accusing someone without reason ), helping poor people, respecting people , parents, trustworthiness, honesty and many many things . even unbelievers, people who don’t believe God follow these rules , there is no need for God to follow these rules ,the common people understand the rule and use it in their life.
The difference in the Islamic rules is that they start with love and loving the prophet and imam.
As in Soreh Shora/23 , It is clearly stipulated “This it is which Allah announceth unto His bondmen who believe and do good works. Say (O Muhammad, unto mankind): I ask of you no fee therefor, save lovingkindness among kinsfolk. And whoso scoreth a good deed We add unto its good for him. Lo! Allah is Forgiving, Responsive.”
We also have many saying (Hadith) about loving prophet and imam.
I agree with you that loving is not enough for a believer , a truth believer who love them ,should act to what her/his beloved ask for.