Question for COVID-dissidents and anti-vaxxers

Introductory note: I saw the aphorism above spray-painted by some unknown person on one of the walls of my high-school.  Of course, it was written in French (“l’éclat des certitudes m’amène à tuer“).  Only years later did I understand that it refers to the dangers of certitudes which we often elevate into dogmas and into a valid cause for both physical and spiritual fratricide (this is the sin we commit