From a New York Times story by Sheera Frenkel and Steven Lee Myers headlined “Antisemitic and Anti-Muslim Hate Speech Surges Across the Internet”:

On Oct. 7, the day Hamas attacked Israel, the hashtag #HitlerWasRight appeared on X, the platform formerly known as Twitter. Over the next month, more than 46,000 posts featured the hashtag, often alongside language that called for violence against Jews.

At the same time, the hashtag #DeathtoMuslims also spiked on X and was shared tens of thousands of times, according to a review by The New York Times.