It's all part of their scheme to undermine scientific inquiry and scientific results. They're angry that the facts don't align with their preferred ideology so they're attacking the very system yielding those facts. We can dismiss this as being sophomoric, but I'm afraid it can lead to disastrous results - because what they're really attacking is Truth itself. If they can dissuade you from believing facts and truth, then they can fill your head full of their "alternative facts." This was laughable back in 2017, but now we see it's no joking matter because it works.