Teeeeensy nitpick: there are two definitions of genocide that have ever mattered. Two. Not many. Two.
Lemkins original, much much broader, definition, And the one you’re familiar with, adopted by the UN because like everyone on the permanent security council thing had an interest in the definition being a little more narrow. Under which the way the Palestinian people are being exterminated absolutely still counts.
Interestingly, by lemkin’s broader definition, making the shutzstaffel stop killing Palestinians might constitute a genocide of the kapostanis; it would be destroying every trace of their culture, and the means of its reproduction.