Ultimate Agenda Contrary to what writers of mystery novels and the standard cops and robbers scripts present, motives are as varied as the individual. Human lore portrays murder for vengeance, for sport, for power or money, but seldom if ever portrays murder for desensitization or simply to attain peace and quiet. They understand they will be living with their own kind in the future, segregated by orientation, and that the more ruthless will rule those who hesitate. Many murders are also committed simply to rid oneself of a temporary annoyance - the loud mouth at the bar, the aggressive driver weaving in and out of traffic, or the demanding shopper never pleased with what the clerk brings forth.
Motives are complex.
What can be said about ultimate alien agendas is that they can be cleanly divided by orientation. Other may tell their contactees hard facts about the coming Earth cataclysms but the ultimate agenda is empowerment of the individual and safe passage. The ultimate alien prize is the human soul, which will incarnate in this or that orientation repeatedly. The ultimate agenda is not to secure the human body, which will inevitably die, it is to secure the soul, the spirit entity that lives without dying. Ultimately, this makes for a better neighborhood, so this effort is not entirely without self interest.