Political rhetoric branding Muslims as invaders legitimated terrorist violence. [causal]
That white gunman, a terrorist with the aim of slaying as many Muslims as he could on that unholy Friday, saw them as intruders, interlopers in a land that was not theirs to live or pray in. And he assumed the call of duty from presidents and politicians who flagged all Muslims as "invaders."
Khaled A. Beydoun, The New Crusades_ Islamopho…, loc. 876