The written response to any invite to speak at any college should be,
“Thank you for your generous offer, but as students at your institution have learned to shut down any speech that varies from leftist orthodoxy, please GFY. Thanks, and have a nice day!”
Bob Dole was the commencement speaker at my daughter’s college graduation. This was 1993 and yes there were protests but it amounted to students wearing a pineapple on their cap with a slash through it. Times have changed.