It is very likely that these people made such a big wish in their past lives: I hope that when I come here, my fame will increase, I will be famous all over the world, and I will be well-fed ...... So I became a star in this life, just like Sakyamuni Buddha who came to all beings by the will, and everything can't escape from the will.
Second, it is possible. Some of these people are demons, sons and grandsons, who preach evil ideas such as killing lives, which confuse people and degenerate their nature.
Fourth, these people may be practitioners, who try to transform the world as stars, turn evil into good deeds, do charity, walk once in this world and ascend to heaven after death.