Spiders actually were my greatest phobia growing up , because having more than two eyes, having 8 legs, fangs, venom, and carrying your house up your wazoo just kind of was a combination that freaked me out more than any other creature.
Even then I didn't kill them though. Not even if they were crawling on me in the middle of the night. I believed they were inherently good, just scary , and they growled at me in my nightmares and squeaked as they attacked me from behind doors. I would pull all their legs off and their fangs would have to be surgically removed (in my nightmares.)
Then I held them and realized "I like Green eggs and ham. I really like them Sam I am". You don't know until exposed properly. If all I did was run away from Green eggs and ham, I would still be scared of them.
Now I don't feel complete unless I have at least one.