That isnt the point, human nature although stubborn when forced to look at reality will need to do one of two things. Force a rift causing them to ignore it completely which means they subconsciously accepted what it was, or to look into it. To do the research themselves because curiosity is a strong thing and later on they find themselves down the rabbit hole of fuckery that is the swamp. You can't force others to accept your point of view, but you can plant the seed of curiosity in them. In a few weeks youll know what happened, and if they are still the same then you need to ask yourself is it worth being in contact with them?

I've done this to him before with violence. He was a punk ass fighting bad boohoo bitch, but ive told him that although he may not like it, someone pushing you, hitting you, or something can kill him. We are fragile creatures and some other things about perception being reality to strangers. He now owns firearms, etc