After repaying their debts, they would likely change their minds.
Because they had already begun to grow stronger and had formed their own armies and systems, after the war, the Demon Race would naturally enter human organizations to expand, which meant that their homeland would also expand. However, they would not gain more living space, because it was necessary to control their abilities and their reproduction numbers, so they could only be allocated a space within a certain area.
Perhaps the Demon Race was reluctant to survive within the original organizations, preferring their familiar homelands, but unfortunately, unless the war ended completely, they could not return to their homes, which were now in ruins and uninhabitable.
