You could just Google his comments or listen to his podcasts he promoted violence.

Charles Kirk, the recently killed hard-right Christian nationalist, had been “repeatedly making references to physically assaulting and even lynching trans people on his podcast, the Charlie Kirk Show”.

Sometimes he targeted his violence specifically against trans. Other times, he incited violence more broadly against LGBTQ along with other minority groups.

He was using Christianity as a shield, he was a fake Christian