It's akin to the reaction I'd feel if someone said "I drink through my finger like Mork," and then went ahead and proved it. It would be vaguely disturbing to see, and would shake my entire worldview.
That's how I feel about people who don't read.
Now, I don't read as much as I used to, or would like, because life as a full-time employee of an insanity-ridden corporation takes a lot of time an energy, but to find somebody who chooses not to read because they don't enjoy it... That's like finding Sasquatch-on-Nessie porn and being unable to look away even though you feel like you could puke.
Nothing against them as individuals, I'm sure they have virtues that I don't, but... I can't help but look over my shoulder every so often. You never know when a non-reader, or a space invader, may be stalking you.