Fair. Nevertheless, like... did it have to be Hitler in particular, probably not, but the list of people that were sufficiently extremist anti-Semite that either they or their subordinates would go that far off the moral cliff, who would essentially end up running on an explicitly "genocide the Jews" as a platform once in office, is still significantly smaller than merely the set of German fascist possible-Chancellors, or even the set of potential Nazi Chancellors.But large parts of the process didn't happen via the kind of gassing you're thinking about. There was a lot of old fashioned just lining people up and shooting them, and weird experiments that were somewhat successful in having a car and driving people around while gassing them to death, and--
Okay, I could keep on going, but it's all horrible, but that didn't all come from Hitler's fetid brain. The idea of killing all the Jews? Well, sorta-yes, but others had said and advocated for the same things.
If we imagine running 1930 Germany in simulation a bunch of times hoping for a better result, I think it'd be... very hard to get a timeline that didn't end with Germany waging World War II; very hard to get a timeline that didn't result in Jews suddenly facing a lot of organized persecution; and honestly probably pretty damn hard to get away without an awful lot of Jews dying. But my amateur/armchair historian's opinion is, it probably wouldn't be that hard to get away without the Holocaust, a timeline in which both the sheer numbers and the sheer ridiculous sadism that made the Holocaust exceptional didn't exist. You might even be able to get away with just killing off Hitler (and maybe his top two most-radical subordinates.)