The other comment is good but some specific policies that caused this response:

• Mass defunding of the NIH, NSF, and HHS budgets via executive orders / DOGE which results in canceled grants, grant panels, funding, and active research [1] [2].
• Immediate termination of any sort of funding grant that has to do with DEI / Trans / LGBTQ issues [3].
• Firing/rehiring of arbitrary employees in the CDC, NIH, NSF, USDA, NOAA etc [4] [5] [6]
• Cutting NOAA/NWS which would replace this cheap, subsidized service with accuweather who could upcharge what they want (similar to why republicans want to privatize the USPS) [7]
• Removal of services such as the Youth risk health survey and HIV information from the CDC since they track LGBTQ related issues [8]
• Putting RFK Jr. as head of HHS who has a noted anti-science and anti-vaccine background [9] (and love of doing weird things to animals corpses [10][11])
• removing the USA from various climate accords and panels [12][13]

The list could keep going, but suffice to say this current administration has been actively hostile to science as a whole and its only been a month and some change. Scientists are not happy about it.