I divide people up for ridicule or indifference based on whether or not they can spell "believe" properly.
OK, I think that most people who believe in Angels or Aliens are idiots, not because they believe in them per se, but because belief in Angels tends to accompany an affinity for the works of Thomas Kincaid, doilies on toilet tanks, manicheanism, and theocratic politics, which I loathe, and belief in Aliens tends to accompany irrational fear of globalism, veganism, crystallomancy, and suchlike squishy thinking which I despise. More to the point, one may suspect either or both without incurring my disdain but to "believe" in them implies faith, and faith is just self confidence misplaced. To those I say, "Grow a pair! Own up to the fact that we wrecked our own planet and threw ourselves out of the garden, and start fixing that. There ain't no cosmic mommy coming to clean up after you, so get cracking or stop bitching."
Personally, I think that there are likely extra terrestrial intelliences, but they have probably not visited here. Winged bipeds as messengers from the beyond, however, have more to do with Jungian Archetypes than any sort of objective reality, such as it is.
(I sterotype broadly here for humorous purposes. The core argument, though, is, I believe, valid.)