In a tweet that accused the Republican party of inciting white nationalist violence, the purportedly Jewish organization parroted neo-Nazi talking points of politicians "pandering" to all-powerful Jews to gain politically.
Because, obviously, no sane Gentile would ever support a position most Jews support unless they are politically forced to.
Usually posts like this will substitute the word "Zionists" for "Jews" to maintain the fiction that the anti-Zionists are animated by the exact same hate that antisemites have had for millennia. In this case, the mask slipped off, and IfNotNow showed not only that it is a deeply antisemitic organization itself but that its pretense of being a Jewish organization is a sham.
As of this writing, IfNotNow has not removed the tweet, nor has it apologized, 25 hours after it was posted.