The exiles' new civilization began to grow on a beach of an island near where the Astari lived. The Astari saw this, and observed, but did not act. After all, if the exiles had reached land, it must have been the will of their god, who always acted for their best wishes. After all, had their god not given them an island, and fruit trees, and shelter? Had it not given them their very own Eden, where they could live as individuals who all acted the same? Of course it had. And of course the exiles were not to be feared; at worst, they should be laughed at for their silly refusal to accept the one true god. The exiles were not a problem at all.
As time went by, the civilization grew, and soon expanded their range from the beach to the thicker grass and trees farther into the island. The Astari observed this, but were unworried. After all, this was surely just evidence of how the exiled people wanted back into the Astari society. The expansion of range was just a futile attempt to find an Eden of their own to live in. And of course, no Eden would be found; no place could measure up to the proud homeland of the Astari. What these new locals deserved, more than anything, was mockery.
So, even as the colony grew larger and stronger, the Astari came by and mocked. They did so daily, only leaving when they were given a sign to leave; the ground would shift beneath their feet, and they would head home. After all, if the ground is shifting, obviously god is simply saying that the time for mockery is finished, and home is where they should return to. Although this was a more direct action than they were used to from their god, the Astari abided by it; after all, god must be obeyed by each individual as they see fit so long as it is done in a way approved of by the greater group for the greater good.
Generations went by, and soon the neighboring island was colonized along the coast. There was no place for the Astari to land without immediately being amongst the unclean children of the exiles. At this point, the Astari realized that mockery was not the correct way to show their righteousness. Rather, the correct way would be through a demonstration of their holiness. As such, the Astari instead began converting all who were willing to their religion. While it was slow going, they did get some converts; the first month, three arrived and joined their group, and at the end of the second month, they had nine more new Astari.
This was expected, of course. For how could anyone possibly worship a false religion once they saw the Astari god? This god was good, this god is good, this god will always be good. This god is loving and peaceful. This god gave them a brave new world full of everything they needed to survive. And so of course the Astari were happy. Unlike other people, their god was always there for them, with plentiful food and comfortable lodging. All they had to do was occasionally collect the food and fortify their homes, and then there would be no problems for them at all. This god demanded nothing from them, took nothing from them, and provided them with everything. Perhaps the world beyond the island was considered harsh and inhospitable, but that was just further proof that theirs was the only true god. Those on the other island, the maskless exiles...pah! They had to scrape a living out of the land. They had to build their own homes and constantly protect them from the winds, from the animals, from the wild. They had to build fields and scare away parasites. Not so for the Astari. God loved them.
And, as usual, the Astari would show their belief at the end of the month with their day-long festival to worship god.