Quote from Adam Serwer of The Atlantic:
“The apparent spark for the worst anti-Semitic massacre in American history was a racist hoax inflamed by a U.S. president seeking to help his party win a midterm election. There is no political gesture, no public statement, and no alteration in rhetoric or behavior that will change this fact. The shooter might have found a different reason to act on a different day. But he chose to act on Saturday, and he apparently chose to act in response to a political fiction that the president himself chose to spread, and that his followers chose to amplify.”
“As for those who aided the president in his propaganda campaign, who enabled him to prey on racist fears to fabricate a national emergency, those who said to themselves, “This is the play”? Every single one of them bears some responsibility for what followed. Their condemnations of anti-Semitism are meaningless. Their thoughts and prayers are worthless. Their condolences are irrelevant. They can never undo what they have done, and what they have done will never be forgotten.”
More about how it happened and who’s responsible at An Ingenious Device for Avoiding Thought.