Why not link to the original paper? https://link.springer.com/content/pdf/10.1007/s11577-020-007...
> However, the actual net response rate dropped from 14% to 7.5% when we consider only those who completed at least 80% of the survey (n= 501), which is clearly poor and has to be kept in mind when drawing conclusions from the data. All analyses are based on pair-wise deletion of missing values.
Divisive political issues attract people at the fringes of the political spectrum. If you're getting less than 10% of the sample filling the majority of the survey, it's likely that your sample is just those people interested enough to fill it out because they're on the fringes.
I am skeptical of the results, because in my experience at university (2007-2012, 2017-2020) I never observed "wokeness" or concern over microaggressions or many of the things right wing media reports on. It's a more likely explanation that Conservatives have victim complex, and "university wants to burn books and ban speakers" fills that complex well.
Why? Politics is just business in disguise. My theory is that conservatives don't want government to pay for education, and in the US they are succeeding in this goal . Saying universities are hypocritical is a good excuse.