Universities which support such people should lose all federal and state funding plus their accreditation.
How do you propose to preserve the 1st Amendment right of free speech for the truthful skeptics who find Climate Chnage to be a hoax and a fraud, if you deny the 1st Amendment right of free speech to the liars using lies in support of Communism and Climate Change alarmism?
Mind you, I’m not suggesting it cannot be done, but it is a difficult contradiction to resolve and requires specific solutions..