“I seriously wonder when it's going to become 'acceptable' to attack white people for being white--without even requiring any Jewishness”

Kind of depends what you mean by “attack.”

It’s been acceptable to verbally attack and collectivise white men for quite a long time. White-ness is an attempt to broaden that to all white people.

But I don’t think it’s widely considered acceptable to physically attack anybody, including Jewish people, in the physical sense.