Muslims might argue that the Shema clearly states that God is one and does not support the idea of a multi-Personal God.

The Shema, which is foundational to Jewish monotheism, states that 'the Lord our God is one.' However, the term 'Elohim' is a plural noun, which can suggest a multi-Personal nature of God. This is further supported by the Hebrew word 'echad,' which can denote a composite unity rather than a strict singularity. Thus, a more nuanced interpretation of the Shema could lead to the understanding that God is one in essence but exists in a multi-Personal form. Moreover, prophetic texts such as Isaiah 40:3-5 and Malachi 3:1 indicate that God Himself will come to His temple, which implies a personal manifestation of God that is more than a singular entity. These verses point to a divine figure who is both distinct from and yet fully God, reinforcing the idea of a binitarian nature within the unity of God. In summary, the Shema does not negate the possibility of a multi-Personal God but rather, when examined closely, can be seen as supportive of it. The Christian understanding of God as a Trinity finds a basis in these interpretations of the Shema and the prophetic writings, which reveal a complex unity in the divine nature.