"To paint with a broad brush, all of the skeptics I have come across are debunkers. They have already made up their minds that there are no other intelligent species in the universe than man."

I'm a sceptic (UK spelling) and I certainly haven't made up my mind about "other intelligent species in the universe than man". As far as I can see there's no evidence either way - so no basis for making up my mind.

I'm a bit closer to making up my mind about conspiracy theorists and UFOlogists though!