Christian singer-songwriter Colton Dixon said the assassination of Charlie Kirk and the government’s restrictive response to the COVID-19 pandemic “changed” him. Dixon, 35, told CBN News seeing Kirk murdered for exercising his right to free speech pushed him “to seek truth harder.” “I feel like, just for a lot of people, whether you believed in what Charlie stood for or not, just for a lot of people, it was, like, it just — I don’t know, it chan…