The caption on that image is usually "You make kitty scared" (http://www.hollow-hill.com/sabina/images/you-make-kitty-scar...). I took that to mean that Lispers see Haskell and get scared by it's seemingly unnecessary complexity.

Cute: very elegant.

Vicious: I have to model all my program's data structures within Haskell's type paradigm, or I get ripped to shreds by the strict type checker.

Alternative explanation: the photo shows what I looked like after I programmed in Haskell for a while :-)

Bias: I'm a lisp programmer xD

My guess: "pure fp" can be a scary experience. :)