Because they DARE ignore the trump and base what they advise on TRUTH PROOF EVIDENCE SCIENCE.
The trump bases it on his gut, a hunch, his arse.
So just as doctors who performed abortions would regularly get blown up by anti-abortion advocates so too are health officials being threatened by pro trump adoring worshippers who will not tolerate truth because the trump doesn't like it.
The more things change the more they stay the same. These peeps inbreed among one another and you know what that does to the intelligence pool don't you? And still they breed among themselves.
