SCP-3125 is adapted for survival in an ideatic ecology considerably more violent and hostile than our own. (Here, “our own” refers to human head space: the set of all ideas which humans have or are biologically capable of having.) Because humans have no natural exposure to ideas as aggressive as SCP-3125, human minds have no protective evolutionary adaptations against it.
Reminds me of this SCP:
Oh, the anti memetics division! My favourite.
It’s my first day.
Saaaame!