Are spiders an extraterrestrial species?

This is very true, and this is the main reason people find them so very creepy. It is an instinctive reaction to the inner knowing that the world has predators, and they all have an inner link to the awareness of this foreign influence, and so all are sharing great inner fear that is deeply rooted in the human psyche from so many centuries of subjugation and torment caused by the cohort of foreign species introduced into Earth precisely for this purpose.