Who cares what his thoughts and opinions are! As long as he doesn’t harm anyone I couldn’t give a damn! We don’t shun people for abhorrent thought, only abhorrent behavior!
I can't read French (shoot, scroll down to the English), but I believe he was originally invited to share his thoughts and opinions. So the audience of EPFL cared. Now, EPFL doesn't want to risk giving a platform to, or otherwise being associated with, potentially problematic speech that they do not control. I'm sure he can still be a member of the audience at EPFL, so I don't know that this is shunning, per se.
Hi, EPFL PhD student here.
Please note that the lecture was organised and then canceled by CLIC, which is a student association. EPFL did not write this statement: the linked website is CLIC, not EPFL.