“Does God love everyone or just Christians?”
Love is not just something God does, it’s who he is, the overarching quality that characterizes him and the “glue” that binds together all his glorious attributes. Scripture is clear that he expresses his loving nature freely in the world, sending rain on the just and unjust alike. This expression of love is often referred to as “providence” or “common grace”, made manifest in indiscriminate kindness, delay of judgment and so on. Such generalized goodwill on God’s part toward mankind despite our fallen condition makes sense: it would be odd for Christ to command his followers to love our enemies if God did not act lovingly toward them too.
And he did. “God shows his love for us in that while we were still sinners, Christ died for us.” We were loved before we were ever saved.