How do Modalists respond to the idea that the Trinity is necessary for the manifestation of God's love?
I often hear an argument defending the doctrine of the Trinity that says that God is by nature loving and relational (see, for example, 1 John 4:7–8), and that he exists independent of his creation. That is, if there were only one person in the godhead, instead of three, God's love wouldn't have a way to manifest itself outside of/prior to the created order.
Modalists, whether historical Sabellians or modern day Oneness Pentecostals, presumably have an issue with this argument. How do Modalists defend their viewpoint from this argument? How do they understand God's loving nature in this context?