What is meant
The distinction here is not a mere linguistic detail, but a separation between Islam and faith with respect to their pillars and the place of moral and human values. The quoted statement places those values within general Islam and describes faith as specific to the followers of Muhammad’s religion alone.
What is attributed to Shahrur
Shahrur says: “The pillars of Islam differ from the pillars of faith, and tradition has conflated the two. Moral and human values belong to general Islam, not to the faith specific to the followers of Muhammad’s religion alone.”
This establishes two points here: that the pillars differ, and that moral and human values are included within general Islam.
Atlas explanation
This passage does not equate Islam with faith, nor does it make moral and human values part of the faith specific to this division. It provides an entry point for reading the relationship between Muhammad Shahrur: A Guide to the Contemporary Reading of the Wise Revelation and Islam, Faith, and Righteous Action and Islam without assuming that they are synonymous.
Synthetic conclusion
The statement can be understood as a redistribution of the religious domain: a general level to which human values are attributed, and a specific level described as faith. But this is an explanatory inference from the statement, not a comprehensive definition of the two terms.
Open question and limits of the evidence
This evidence alone does not establish that Islam is defined as belief in God and the Last Day together with righteous action, nor that faith is defined as belief in Muhammad’s prophethood and the rituals. Nor does it specify all the pillars of either. Further evidence is needed to establish these details.
For the broader context, see Faith, and Righteous action.
Source
Guide to the Contemporary Reading of the Wise Revelation, p. 39.