It's not the "who", it's proven FACTS. Ones determination, depends their intelligence of being able to determine the difference between fact, and falsehoods, fallacies, and out right lies, if they are willing to do so. And now we live in the age that a great many people don't care for the truth, as it doesn't fit their mindset, and won't accept it. Instead they willingly adhere to some delirious, absolute falsehood.
Right. Both sides can and do make this statement. Which leads us back to the question of which one is right?