Science bros often misuse "anti-science" to try to shutdown opinions they disagree with. Hence people worried about the unlikely event of being killed by a nuclear power plant are anti-science, but people worried about the even more unlikely event of being killed by a super intelligent AI aren't. Misusing the word "science" (particularly by people who don't seem to have a good grasp on it) and turning it into a rhetorical cudgel is harmful, and pushes the idea that science is ideological.